Charles Ford Langworthy / B. R. Coad / C. J. Babcock / Cecil Calvert Thomas / Charles Dwight Marsh / Clyde Ray Chambers / Don Divance Lescohier / Ellis Lore Kirkpatrick / Frank Barnes Herbert / Frederick David Richey / George Oury Gatlin / George Ray Boyd / Harry Edward Roethe / Horace Mann Woolman / Howard Ross Tolley / James Allen Nelson / Jason Edward Barr / Jesse Lee Webb / Josiah Chase Folsom / Norman Eugene McIndoo / Oliver I. Snapp / Walter Wesley McLaughlin / William Walter Yothers / Richard Ambrose Hart / A. B. Clawson / Alice Ranney Thompson Merrill / Arnold Parker Sturtevant / Arthur Charles Mason / Arthur Frederick Sievers / Charles Harold Alden / Elmer Johnson / Harry Baker Humphrey / Helen W. Atwater / John Robinson Winston / Roscoe Ward Wells / Walter Raymond Humphries / Bruce Lineburg / Guy L. McNeil / Ilena M. Bailey

OSU:32435051444461

Aerial spraying and dusting in agriculture

Edward C. Peck / Arthur Koehler / Charles Walter Collins / David Edmund Stephens / Ernest Bateman / George William Trayer / Hazel Katherine Stiebeling / Herbert Dwight Smith / James Edward McMurtrey / John Guice Sutton / John William Roberts / Joseph Clarence Silver / Joshua John Skinner / Mark Hughlin Haller / Milton Henry Fohrman / R. D. Garver / R. W. Leukel / Ralph Lester Miller / Raymond Secord Washburn / T. D. Jarrell / Thompson Elwyn Woodward / Walter M. Osborn / William Henry Fry / William Jasper Spillman / William John Nolan / Willis James Nolan / Carrington Bonsor Williams / Hazel Edith Munsell / Henry Morris Wanser / Ione P. Bassett / James Geere Dickson / James McKenzie Hankins / John Brown Cuno / John Clymer Dunegan / John Holmes Martin / John Robert Magness / R. R. Graves / Samuel Frederick Potts / Aaron Francis Bracken / Aaron Guy Johnson / Fletcher Pearre Veitch / Harvey Blount Mann / William Walter Yothers

OSU:32435027441211

Agriculture

A. D. McNair / Alexander Wetmore / Arlow Burdette Stout / C. J. Babcock / Duncan Dunning / Franklin Elmer Allison / George McMillan Darrow / George Pelham Walton / Horace Harold Willis / John Holmes Martin / John Robinson Winston / Joseph Heilman Shollenberger / Julius Valentine Hofmann / Ralph Waldo Smith / Raymond Secord Washburn / Robert Lesley Davis / Robert Percy Brandt / United States. Office of Experiment Stations / Warren Clemmer Funk / Wells Aleck Hutchins / William Henry Waggaman / William Middleton / William Stuart Moir / Charles Frederick Clark / Clyde Evert Leighty / Henry Wyatt Easterwood / Jacob Allen Clark / John Jay Bowman / Joseph M. Braham / Lawrence Root Waldron / Walter Keith Marshall / David Augustus Coleman / James Edward McMurtrey / Thomas B. Turley / William Walter Yothers

OSU:32435051444412

Agricultural experiment stations

Austin Winfield Morrill / Leland Ossian Howard / United States. Bureau of Entomology / Warren Elmer Hinds / William Dwight Pierce / William Walter Yothers

UIUC:30112009257640

Aleyrodidae

W. E. Hinds / William Walter Yothers

HARVARD:32044107179012

Apples

William Albert Berkey / Ruth B. Reichley

WISC:89060747235

Berkey family

William Walter Cort

UIUC:30112068180345

Freshwater snails

Allen David Edwards / Edward Hadley Glass / Emanuel Azar / Grover William Underhill / Le Roy Cagle / Reece Lawrence Bryant / Robert Gordon Henderson / Walter Senett Hough / William Lloyd Gibson / Alfred Benjamin Stephenson / Otelia Francis Bodenstein

UIUC:30112019904843

Apples

Axel Leonard Melander / Edward Franklin Gaines / Edwin George Schafer / George Alfred Olson / Henry F. Holtz / Sophia Eckerson / State College of Washington. Adams Branch Experiment Station / State College of Washington. Agricultural Experiment Station / William Hislop / Carroll Evan Howell / M. A. Yothers

UIUC:30112079402266

Agricultural experiment stations

Benjamin Arthur Bourne / Frank Heyward / G. H. Blackmon / Harold Mowry / Henry Glenn Hamilton / Herbert S. Wolfe / J. W. Wilson / Leonard William Gaddum / P. T. Dix Arnold / Walter Herman Anthony Leukel / Arthur L. Stahl / John Melton Coleman / Marvin Adel Brooker / R. M. Barnette / Rudolf William Ruprecht / J. P. Camp / L. R. Toy

UIUC:30112019471587

Asparagus

Albert Samuel Curry / Donald Robert Burnham / H. N. Watenpaugh / John Carter / Kenneth William Parker / Percy Walter Cockerill / W. L. Black / Wilbur Ellis Watkins / John Selden Cole / R. P. Callaway

UIUC:30112018065422

Actinea richardsoni

Clive R. Harston / George William Fischer / J. R. S. Jorgens / John F. Moore / Paul Henry Landis / State College of Washington. Agricultural Experiment Station / Walter L. Slocum / Edwin Coblentz Voorhies

UIUC:30112003208359

Agricultural experiment stations

Benjamin Koehler / Charles Elmer Durst / Frederick Charles Bauer / Frederick Francis Weinard / John William Lloyd / Laurence Joseph Norton / Oliver Ralph Overman / Paul Hubert Tracy / Sleeter Bull / Victor Wendell Kelley / Walter August Huelsen / Wesley Pillsbury Flint / William Leonidas Burlison / Ben Bowen Wilson / Carl Otto Mohr / Harrison August Ruehe / Horace Mead Newell / James Ransom Holbert / Jay Courtland Hackleman / John Harwood Longwell / Merl Conrad Gillis / Orlando Ford Garrett / Samuel Wesley Decker / Fred Carl Olson / Ogle Hesse Sears

UIUC:30112019528584

Agricultural prices

Charles Aubrey Thomas / Chester Distad Dahle / Frederick Fouse Lininger / Frederick Grover Merkle / Harlan Noyes Worthley / Martin William Lisse / Pennsylvania State College. Agricultural Experiment Station / Raymond Adams Dutcher / Walter Spurgeon Beach

UIUC:30112019824892

Agricultural experiment stations

William Walter Yothers / Arthur Charles Mason

STANFORD:36105019613491

Agriculture

William John Petersen

UVA:X001131616

Iowa

William Hurford Lawrence

UIUC:30112019916490

Anthracnose

William Donald Murray

MINN:31951D001337451

Sphecidae

D. A. Sanders / George D. Ruehle / George Frederick Weber / Herbert S. Wolfe / John Vertrees Watkins / P. T. Dix Arnold / R. D. Dickey / Roy Emil Blaser / William Merwin Fifield / David G. A. Kelbert

UIUC:30112019471629

Bacterial diseases of plants

Axel Leonard Melander / Elton Fulmer / H. W. Sparks / Morgan William Evans / Roscoe Wilfred Thatcher / State College of Washington. Agricultural Experiment Station / William Hurford Lawrence / Rolla Kent Beattie

UIUC:30112019907549

Agricultural experiment stations

A. D. Jackson / Ernest Mortensen / Frank Lincoln Thomas / Frederick Driggs Fuller / Leslie Rushton Hawthorn / Lester E. Brooks / Paul Christoph Mangelsdorf / William Heartsill Friend / Cecil E. Heard

UIUC:30112084979811

Agriculture

Morgan William Evans

UIUC:30112019916714

Peas

William Hurford Lawrence

UIUC:30112019916276

Dairy cattle

William Heartsill Friend

UIUC:30112019881355

Citrus fruits

William Hurford Lawrence

UIUC:30112019916060

Burning of land

William Watts Hart Davis

NYPL:33433081815205

Bucks County (Pa.)

William Walter Yothers / John Robinson Winston

UIUC:30112019239158

Agriculture

Arthur Vance Swarthout / Charles Sidney Leete / David Griffiths / David Segrid Olson / Elmer Lash / Ernst H. Wiecking / Frank Getz Ashbrook / Frank Heidtman Lathrop / Frederick Charles Lincoln / George Emil Heck / George Herbert Coons / H. F. Willard / Harold Coleman Hallock / John Chambers McDowell / Justus Watson Folsom / M. A. Yothers / R. W. Leukel / Ralph Henry Elsworth / Reginald D. Forbes / United States. Department of Agriculture / Walter Cochran Davis / Wiley Croom Smith / William Gustavus Wahlenberg / Charles M. Harris / Dewey Stewart / Donald Bruce / Fletcher Pearre Veitch / Floyd Frank Bondy / Ira Burton Lanphier / Karl Burchard Hanson / Theodore Lemuel Bissell / William Melvin Mohler / Finley George Larmer

OSU:32435053093035

Aerial spraying and dusting in agriculture

Albert Hansen / A. F. Satterthwait / Arnold Phipps Yerkes / Bruce Drummond / Charles Landon Goodrich / David Ernest Lantz / Ernest Kelly / Everett Franklin Phillips / Frank Hurlbut Chittenden / George A. Lawyer / George G. Ainslie / George McMillan Darrow / H. P. Gould / Harry B. McClure / Henry James Washburn / Howard Ross Tolley / J. A. Drake / Marion Imes / William Jeter Phillips / William Walter Yothers

OSU:32435055029078

Alfalfa

William Walter Yothers / Arthur Charles Mason

STANFORD:36105019613491

Agriculture