Find a Collection
Refine Your Search
By Subject
By Resource Type
By Author
Filter by Author
Type 3 or more letters to see results
- A. A. E. Berg
- A. S. London
- Alice Hansche Mortenson
- Arthur Hedley
- B. V. Seals
- C. B. McCaull
- Clyde W. Rather
- D. I. (Daniel I.) Vanderpool
- David J. Tarrant
- E. E. Wordsworth
- E. W. Lawrence
- E. Wayne Stahl
- Earl C. Wolf
- Edith Carey
- F. W. Davis
- Frances B. Erickson
- Gideon B. (Gideon Brooks) Williamson
- H. Orton Wiley
- Haldor Lillenas
- Hardy C. Powers
- Hugh C. Benner
- Ila R. Monday
- J. Kenneth Grider
- James P. McGraw
- John T. Donnelly
- John W. May
- Kathryn Blackburn Peck
- Lauriston J. Du Bois
- Louis McCurdy
- Marian L. Knorr
- Mont Hurst
- Mrs. W. M. Franklin
- Norman C. Schlichter
- Norman R. Oke
- Oscar Hudson
- Ovella Satre Shafer
- Pearl O. Burnside McKinney
- Ralph A. Mickel
- Raymond C. Kratzer
- Richard S. Taylor
- Ross Hayslip
- Samuel Young
- Stephen S. White
- A. B. Mackey
- A. K. Bracken
- A. R. Higgs
- Albert F. Harper
- Alice W. Norton
- Allen A. Bennett
- Anna M. Gilleland
- Arnold E. Airhart
- Bertha Munro
- Buford Battin
- Carroll P. Lanpher
- Chester D. Plummer
- Clara M. Morrison
- David Hynd
- Delbert R. Gish
- Don Coonrod
- Dorothy Boone Kidney
- E. Drell Allen
- Earl G. Lee
- Edward L. Dowd
- Edward Lawlor
- Enola Chamberlain
- Eva V. Beets
- F. S. Mitchell
- Fletcher Galloway
- Forman Lincicome
- Fred Reedy
- Genevieve Thompson
- Grace Noll Crowell
- Grace Ramquist
- H. B. Garvin
- Hal M. von Stein
- Harold William Reed
- Hazel E. Howard
- Hazel Lee
- Helen Wilson
- J. Bruce Deisenroth
- J. George Taylorson
- J. J. Steele
- J. M. Yarbrough
- Jean Leathers Phillips
- Jessie W. Finks
- Joe Norton
- John E. Riley
- John E. Stadler
- Justa Lee Allen
- Katherine Bevis
- L. Wayne Sears
- Leo C. Davis
- Leslie Parrott
- Lewis T. Corlett
- Lloyd M. Hearn
- Lyle Prescott
- Mark F. Smith
- Marvin S. Cooper
- Mary Alice Holden
- Mary E. Cove
- Mel-Thomas Rothwell
- Milo L. Arnold
- Mina Wiarda
- Mrs. A. L. McElyea
- Nelson G. Mink
- Nona Keen Duffy
- Pascal P. Belew
- Pauline E. Spray
- Paul R. Martin
- Paul Updike
- Remiss Rehfeldt
- Roy F. Smee
- Rupert A. Kerby
- Russell V. DeLong
- Sadie Agnew Johnson
- Spencer Johnson
- Sylvester T. Ludwig
- Theodore W. Willingham
- Vernon L. Wilcox
- W. T. Purkiser
- Wanda Milner Winburn
- Wilson R. Lanpher
- Alpin P. Bowes
- Audrey Williamson
- Ben D. Lemaster
- Bernard W. Culbertson
- Bertha Meyer
- Bess A. Olson
- Bill Griffin
- C. E. Shumake
- C. W. Davis
- Carl Warren Jones
- Cecil D. Ewell
- Charles A. Garratt
- Charles Allen McConnell
- Charles C. Powers
- Charles Hastings Smith
- Chester O. Mulder
- Christine White
- Clarence C. Brown
- Clarence Edwin Flynn
- Clayton D. Bailey
- Daniel Stafford
- David J. R. Spittal
- David K. Wachtel
- Dennis E. Wyrick
- Dolores S. Douglas
- Donald H. Strong
- Donald R. Silvernail
- Donald S. Metz
- Dorothy Madden
- Dwayne W. Hildie
- E. D. Messer
- Ed Bennett
- Edward R. Houston, Jr.
- Edward S. Mann
- Edwin Zimbelman
- Emma Irick
- Ernest Moore, Jr.
- Esther Lunsford
- F. C. Nicholson
- Fannie Erb
- Fletcher Spruce
- Floyd T. Smith
- G. Franklin Allee
- Gene E. Phillips
- George Brannon
- George H. Talbert
- George J. Reed
- Grace Marilyn Watkins
- Grace Newcomb Hall
- Granville S. Rogers
- H. H. Hooker
- H. H. Smith
- H. Ray Dunning
- Harold C. Hatton
- Harold L. Johnston
- Harold M. Daniels
- Harold Volk
- Harvey S. Galloway
- Henry E. Brockett
- Hugh Slater
- Irene Imbler
- Isa Sherman Ludy
- Ivan Beals
- J. B. Maclagan
- J. Edgar Hoover
- J. Melton Thomas
- Jack M. Scharn
- James Blaine Chapman
- James R. Snow
- James Robbins
- Jimmie Holman
- John L. Knight
- John Lambert
- John R. Donley
- Jonathan T. Gassett
- Joseph Glenn (J. Glenn) Gould
- Joseph H. Mayfield
- Joy Latham
- June Rudd Pittman
- Kenneth S. Rice
- L. Guy Nees
- Leslie E. Dunkin
- Lester L. Dunn
- Letta J. Sigler
- Lloyd B. Byron
- Lois Blanchard Eades
- Lois M. Marmon
- Louise Robinson Chapman
- M. Dale Brown
- M. H. Rozzell
- M. R. Korody
- Maggie Culver Fry
- Margaret Bogart
- Mark R. Moore
- Martha S. Adams
- Marvin E. Powers
- Mary E. Latham
- Mary L. Scott
- Maud V. Meek
- Melza H. Brown
- Mendell Taylor
- Mervel A. (Bud) Lunn
- Mervel S. Lunn
- Milton E. Poole
- Milton Harrington
- Mrs. Ray Kellom
- O. Joe Olson
- Ora I. Clairess
- Oscar F. Reed
- Otto Stucki
- P. J. Bartram
- Paul E. Cable
- Paul R. O'Brien
- Peter Wiseman
- Ponder W. Gilliland
- R. E. Zollinhofer
- R. Newman Raycroft
- Ralph Earle
- Ray Hance
- Rob L. Staples
- Ross E. Price
- Roy E. Swim
- Roy H. Cantrell
- Rupert Cravens
- Ruth Williams Crooks
- S. L. Morgan, Sr.
- Samuel N. Smith
- T. W. Stofer
- Thelma Gray
- V. H. (Voyle H.) Lewis
- Velma I. Knight
- Vera Clay
- Viola E. Hodge
- W. B. Walker
- W. Everett Henry
- W. H. Davis
- W. N. Harrington
- W. Shelburne Brown
- W. W. Loveless
- Walter E. Isenhour
- Wendell Wellman
- Whitcomb Harding
- Wilbur W. Brannon
- Wiliam James Robinson
- Willard H. Taylor
- William T. Wendell
- A. Elwood Sanner
- A. H. Eggleston
- A. L. Roach
- A. M. Blackmon
- A. M. Quick
- Al (A. J.) Fisher
- Albert B. Schneider
- Albert J. Lown
- Alfred Davis
- Alice Montgomery Barr
- Alice Spangenberg
- Allen B. Miller
- Alma Cravens
- Al Ramquist
- Alva O. Estep
- Alvin L. McQuay
- Amanda B. Cove
- Amy L. Person
- Andrew Young
- Anna C. Baker
- Anna L. Meisinger
- Anna W. Waterman
- Archie H. Rose
- Arthur C. Morgan
- Arthur E. Kelly
- Arthur Townsend
- Aubrey Ponce
- B. F. Haynes
- B. J. Garber
- B. Jerry McClain
- Barney Brumbeloe
- Bartlett P. McKay
- Basil William Miller
- Ben H. Palmer
- Berge Najarian
- Berniece Ayers Hall
- Bernie Smith
- Bertha Stephens
- Bert Morehouse
- Bessie J. Copley
- Bessie York Craig
- Beth M. Nelson
- Betty Hughes
- Betty Powers Runyon
- Bill Butcher
- Billy J. Howard
- Board of General Superintendents
- Bob Breedlove
- Brian L. Farmer
- C. A. Rodda
- C. B. Strang
- C. B. Widmeyer
- C. C. Chatfield
- C. D. Faulkner
- C. D. Taylor
- C. Edwin Harwood
- C. Harold Ripper
- C. Kenneth Sparks
- C. R. Lee
- C.T. Corbett
- C. W. Butler
- C. W. Elkins
- C. William Fisher
- Carl Bangs
- Carl E. Ryan
- Carl J., Jr., Stowell
- Carl W. Gray, Jr.
- Carolyn M. Keith
- Celia M. Wright
- Charles A. Higgins
- Charles Clayton Langford
- Charles D. Ide
- Charles E. Oney
- Charles E. Thomson
- Charles Iden
- Charles Jones
- Charles M. Elam
- Charles McKinney
- Charles Strickland
- Charsten Christensen
- Chelsey Roberts
- Clara B. Brandon
- Clara Galloway
- Clara S. Hoff
- Clarence David Long
- Claude E. Pittenger
- Claude L. Chilton
- Clinton A., Sr., Rock
- Clinton J. Bushey
- Cloyce Elsea
- Clyde Golliher
- Clyde H. Morris
- D. A. Murry
- D. Edwin Doyle
- D. F. Steininger
- D. Trindall
- Dale L. Tiry
- Dale Schulz
- Dallas Baggett
- Darrell E. Luther
- David D. Thomas
- David F. Nygren
- David L. Saucier
- David Shelby (D. Shelby) Corlett
- David W. Ludlum
- Delbert Fleming
- Dick Schumann
- Donald P. Brickley
- Donald R. Keith
- Donald R. Peterman
- Don Ballard
- Don E. Conrad
- Donna Clark Goodrich
- Don Owens
- Dora Hall McCandless
- Doris Coffin Aldrich
- Doris Dabbs
- Dorothea Henderson
- Dorothy Conant Stroud
- Dorothy Lauderman
- Dorothy Wilson
- E. C. Keyes
- E. D. Leavell
- E. D. Wolfe
- E. E. Crawford
- E. E. Spratt
- E. E. Zachary
- E. F. Wilde
- E. G. Theus
- E. R. Haven
- Earl A. Keener
- Earl Marvel
- Ed. McConnell
- Edgar A. Kincaid
- Edgar F. Bibb
- Edith Anderson
- Edith N. Lantz
- Edith Roberts
- Edna Grace Morrison
- Edna Hamilton
- Edward G. Wyman
- Edward Nagel
- Edwin E. Hale
- Edwin R. Anderson
- Elbert Dodd
- Eleanor Hollamon
- Elizabeth M. Dumann
- Elizabeth W. Sudlow
- Ella McCandless White
- Ellen Mary Stewart
- Elma Roberts Williams
- Elsie DeRuiter
- Elsie M. Brownell
- Elton E. Andersen
- Elton W. House
- Emmett E. Taylor
- Enid Chandler
- Erden R. Craven
- Eric E. Jorden
- Ernest J. Myatt
- Erwin G. Benson
- Estelle Crutcher
- Esther Miller Payler
- Ethel G. Aycock
- Ethel G. Hubler
- Eugene L. Stowe
- Eugene W. Moore
- Eugene W. Swim, Jr.
- Evan D. Kaechele
- Evelyn Gladding
- Everette Otis Chalfant
- Everett S. Phillips
- F. B. Whittaker
- F. C. Meadows
- Fairy Steele Chism
- Fannie D. Brown
- Fay M. Whitsell
- Flora E. Breck
- Florence Schneider
- Floyd W. Hawkins
- Forest H. Stoops
- Forrest E. Ladd
- Francis L. Smee
- Frank C. Watkins
- Fred E. Agee
- Frederick Howell
- Fred Floyd
- Fred M. Weatherford
- Fred Scott Shepard
- Fred Smith
- Fred W. Fetters
- Fred W. Gibson
- Fred W. Parsons
- Frieda S. Dause
- G. Burton Cummings
- G. C. Miller
- G. Emery Pratt
- G. M. Field
- G. W. Abersold
- G. W. Irvine
- G. Winson Ledbetter
- Galal A. Gough
- George Brinkman
- George C. Berreman
- George C. Sherry
- George Eplin
- George Frame
- George M. Lake
- George Privett
- George R. Hayes
- George S. Hanson, Jr.
- George Scutt
- George W. Carrier
- George W. Sutton
- Georgia Moore Eberling
- Gerald Hastings
- Geraldine Elam
- Gerald L. Fosbenner
- Gerdonna Wilson
- Gladys Strickland
- Glaphre' Gilliland
- Glendon B. Fisher
- Glen Jones
- Glenn E. Eades
- Glenn H. Tyner
- Gordan C. Wickersham
- Gordon T. Olsen
- Grace Cain
- Grace Dawson
- Grace I. Miller
- Grace J. Meyer
- Grace V. Watkins
- Grace Wilson
- Grover Van Duyn
- Gunnell M. Jorden
- H. B. Dean
- H. B. Hughes
- H. C. Litle
- H. C. Powell
- H. E. Carmony
- H. E. Darnell
- H. G. Purkhiser
- H. Harvey Hendershot
- H. J. O.
- H. N. Dickerson
- H. T. Eastman
- Hallie Smith
- Harlan R. Heinmiller
- Harold C. Gould
- Harold C. Mason
- Harold Kline
- Harry L. Mann
- Harvey E. Finley
- Harvey J. S. Blaney
- Harvey Petersen
- Helen E. Kelsea
- Helen Edminster
- Helen Gray
- Helen K. Swarth
- Helen McIntyre
- Henry W. Stroman
- Herbert J. Van Vorce
- Herbert Land
- Herman L. G. Smith
- Homer Smith
- Howard H. (Howard Harley) Hamlin
- Howard Sayes
- Howard T. Lewis
- Hubert Helling
- Hugh R. Jordan
- Hugh Rae
- Hugh S. Clark
- Hy Young
- I. F. Younger
- I. W. Young
- Ida M. Attebery
- Ira C. Mathis
- Ira E. Fowler
- Isabel D. Watson
- Isabel Pyke Armstrong
- J. B. Rose
- J. C. Collins
- J. C. Dobson
- J. Clifford Mitchell
- J. Crichton Mitchell
- J. D. Powers
- J. E. Hanson
- J. E. Lansdowne
- J. E. Turnock
- J. E. Williams
- J. Fred Parker
- J. Harlan Milby
- J. Howard Sloan
- J. K. Davidson
- J. L. Longnecker
- J. L. Roby
- J. Lawrence Abla
- J. Louis Emmert
- J. M. Anderson
- J. M. Butchart
- J. N. Nielson
- J. N. Tinsley
- J. Paul Downey
- J. Royce Thomason
- J. Russell Gardner
- J. W. Brown
- J. W. Pattee
- J. W. Silvers
- J. W. Swearengen
- J. Wesley Mieras
- J. Wesley Sherrill
- J. William Ellis
- Jack C. Pischel
- Jack L. Thompson
- Jaime Kratz
- James A. Young
- James H. Whitworth
- James Irish
- James Murray Cubie
- James R. Bell
- James R. Garner
- James S. Barr
- James V. Langford
- James V. Wilbanks
- James W. McNeely
- James W. Short
- James W. Tharp
- Janey Sue Little
- Jean M. Low
- Jeanne DeGood
- Jefferson C. Wallace
- Jerald Johnson
- Jerome Beatty
- Jesse C. Burt, Jr.
- Joan Meriwell
- Joanne Durkee
- John E. Maybury
- John E. Wordsworth
- John H. Chambers
- John H. Cotner
- John J. Hancock
- John M. May
- John Stockton
- John W. Eppler
- John Wilmot Mahood
- Joseph N. Speakes
- Joseph T. Larson
- Joseph W. Clark
- Julia R. Gibson
- Julia W. Wolfe
- June Abla
- June Parrish
- K. Boyle
- Kari C. Larson
- Katherine L. Ramsdell
- Kathryn M. Dayton
- Ken Meredith
- Kenneth B. Matheny
- Kenneth G. Rowlett
- Kenneth L. Dodge
- Kenneth Vogt
- Koy W. Phillips
- L. A. (Louis Archibald) Reed
- L. A. Bean
- L. A. Bevan
- L. A. Ogden
- L. Alline Swann
- L. B. Matthews
- L. C. Miller
- L. Dow Wright
- L. I. Weaver
- L. L. Wheeler
- L. Lee Gaines
- L. P. Jack Durham
- L. S. Boardman
- Laura Emily Mau
- Lauren I. Seaman
- Lavaun Tombaugh
- Lawrence A. Whitaker
- Lawrence E. Humrich
- Layton G. Tattrie
- Leah Whitcanack Smith
- Lee L. Hamric
- Leo Darnell
- Leonard S. Oliver
- Leon Chambers
- Leo W. Kirley
- LeRoy R. Ion
- Leslie R. Marston
- Lillian A. Mickel
- Lisa Holso
- Lloyd Mitchell
- Lois Duffield
- Lois Murphee
- Lora Lee Parrott
- Lorraine Johnson
- Lorraine O. Schultz
- Lucile Valentine
- Lucille Clark
- Luther W. Youngdahl
- Lydia Estes
- Lyle Potter
- M. E. Perkins
- M. Harold Daniels
- M. Kimber Moulton
- M. Pearl Hensley
- M. S. Burkhart
- Mabel C. Quadlin
- Mamie B. Hendricks
- Margaret Lee Runbeck
- Margaret S. Connelly
- Maridel Harding
- Mary H. Augsbury
- Mary Haas
- Mary Hawks
- Mary Louise Trager
- Mary Sanders
- Mason Lee
- Maude Cretors
- Maurice D. Laurie
- Maurice R. Emery
- McKinley Wilton
- Michael Courtney
- Mildred June Lovorn
- Mildred McAnally Hamblin
- Milton Huxman
- Monna Gay
- Morris Chalfant
- Mrs. C. A. White
- Mrs. Elmer G. Peterson
- Mrs. Ernest Burlew
- Mrs. F. A. Kidwell
- Mrs. Glen O'Neill
- Mrs. J. C. (Marie) Wallace
- Mrs. James H. Austin
- Mrs. John Nix, Jr.
- Mrs. John Riley
- Mrs. John W. Cochran
- Mrs. John Whipple
- Mrs. Leon Wood
- Mrs. Loyd Bowman
- Mrs. M. Spittal
- Mrs. P. G. Jurich
- Mrs. Paul Wordsworth
- Mrs. Richard Bowes
- Mrs. Robert Prior
- Mrs. Thomas Younce
- Mrs. Wesley Crist
- Mrs. Willis D. Naill
- Mrs. Wm. Davis
- Nancy Ehrlich
- Neal Dirkse
- Neil Hightower
- Neil M. Robertson
- Nellie Morton
- Nettie Hudson
- Nicholas A. Hull
- Nina Jean Griggs
- Noah Benjamin Herrell
- Norman E. Anderson
- Norman Kimsey
- Nota M. McCall
- O. A. Crofford
- O. M. Clay
- Oakley E. Woodward
- Oliva Hinton Kerby
- Oliver Morgan
- Ora J. Turner
- Orval John Nease
- Orville Grisso
- Orville Jenkins
- Orville L. Maish
- Oscar J. Finch
- Pat Johnson
- Paul A. Merki
- Paul Ashland
- Paul D. Mangum
- Paul H. Garrett
- Paul J. Stewart
- Paul L. Moore
- Paul M. Rodgers
- Paul S. Hill
- Paul Seymore
- Paul Skiles
- Paul T. Hendon
- Paul W. McNutt
- Paul W. Wordsworth
- Paul Z. Hoornstra
- Perry Christiansen
- Philip Nathan Cook
- Prescott L. Beals
- Preston J. Theall
- R. B. Oliver
- R. C. Boynton
- R. Curtis Smith
- R. E. Hodgson
- R. J. Cerrato
- R. N. Schappell
- R. T. Kendall
- R. T. Williams, Jr.
- Rachel McMahon
- Ralph Ahlemann
- Ralph D. Henry
- Ralph E. Perry
- Ralph L. Morris
- Ralph L. Moulton
- Ralph Valentine
- Ray Brodien
- Raymond Box
- Raymond Browning
- Raymond McClung
- Raymond W. Hurn
- Renee E. Butler
- Retha Knight
- Reuben Welch
- Rhea (Mrs. H. V.) Miller
- Richard H. Smith
- Robert (Bob) Sporleder
- Robert A. Moran
- Robert A. Rapalje
- Robert Condon
- Robert E. Harding
- Robert E. Mortensen
- Robert Emsley
- Robert F. Woods
- Robert Goslaw
- Robert H. Scott
- Robert Hempel
- Robert J. Burkhart
- Robert L. Liggett
- Robert L. Lunsford
- Robert O. Jackson
- Robert Shaw
- Robert W. Helfrich
- Robert W. Jackson
- Robert W. Sheppard
- Rockwell Brank
- Rose Koogler
- Rose S. Cutler
- Roy A. Bettcher
- Roy A. Wilkinson
- Roy E. Carnahan
- Roy F. Stevens
- Roy L. Smith
- Ruby Moore Harris
- Russell Ellyson
- Russell Shalley
- Ruth (Mrs. Loyd) Burpo
- Ruth Buckner
- Ruth Franklin
- Ruth Wood Vaughn
- S. E. Nothstine
- Sadie Vaughan
- Sam Stearman
- Samuel M. Zwemer
- Stanley Elster Wilkin
- Stanley McElrath
- Stanley N. Whitcanak
- Stephen C. Johnson
- Stephen W. Nease
- Sterling Williams
- Suzanne Raiser Trotter
- Sylvan F. Starks
- Sylvester A. Smith
- T. A. Shirley
- T. Crichton Mitchell
- T. E. Horst
- T. E. Martin
- T. Thomas Liddell
- Thelma Blanche Little
- Theodore Simonson
- Thomas A. Leupp
- Thomas J. Parent
- Torval W. Nilsen
- Tressie C. Graham
- Treva Van Nortwick
- V. Raymond Edman
- Veda Group
- Vera Weightman
- Verdean F. Owens
- Verla U. Gorham
- Vernal H. Carmichael
- Vernon E. Crandall
- Victor Trimmer
- Viola Merritt Lyle
- Viola Perry Wanger
- Virgil K. Grover
- Virgil L. Sprunger
- Virginia Kirley Leih
- Vivian M. Simmons
- W. A. Carter
- W. A. Eckel
- W. A. Strong
- W. D. Kendall
- W. Don Adams
- W. E. (Bill) Varian
- W. E. Albea
- W. E. Burd
- W. G. "Bill" Vermilya
- W. G. Prescott
- W. H. Burton
- W. H. Deitz
- W. H. Puckett
- W. L. French
- W. Lee Gann
- Wallace A. Ely
- Walter E. Simonson
- Walter F. Isenhour
- Walter Williams
- Wayman F. Davis
- Wayne M. Butchart
- Wilbur T. Dodson
- Wilda Wylie
- William C. Allshouse
- William Cowper
- William D. McGraw, Jr.
- William H. Terry
- William Hepting
- William M. Greathouse
- William Meyst
- William Moses Tidwell
- William Robert Adell
- William Summerscales
- Willis E. Snowbarger
- Wouter Van Garrett
- Wright A. Strong
- Zuma L. Jones
- (-) Andrew O. Hendricks
- (-) Fred Thomas
By Resource Language
By Institutional Repository
By Publisher
Active Filters
Showing 4 results.
52 Resources in this Collection
Herald of Holiness, Volume 43 (March 10, 1954-March 2, 1955)
52 Resources in this Collection
Full-text pdf files of Herald of Holiness, Volume 43, published from March 10, 1954 toMarch 2, 1955. The Herald of Holiness (now titled "Holiness Today") is the denominational publication for the Church of the Nazarene. The magazine serves Nazarenes around the world and all Christians seeking holiness material. Holiness Today is a print magazine with articles geared to enhance holiness living by connecting Nazarenes with our heritage, vision, and mission through stories of God at work in the world. Articles are written by pastors, lay experts in various fields, and denominational leaders.
- Religion - Christianity
- English
- Holiness Today
- Olivet Nazarene University
- WHDL
Herald of Holiness, Volume 41 (March 12, 1952-March 4, 1953)
52 Resources in this Collection
- Religion - Christianity
- English
- Holiness Today
- Olivet Nazarene University
- WHDL
Herald of Holiness, Volume 48 (March 4, 1959-February 25, 1960)
52 Resources in this Collection
- English
- Holiness Today
- Olivet Nazarene University
- WHDL