Altus Lacy Quaintance / Ara Marcus Daniels / Charles Ernest Ramser / Charles Franklin Kinman / Charles Orrin Townsend / Charles Vancouver Piper / Edward David Vosbury / G. A. Russell / George Milton Warren / Gerald Thorne / Harry Baker Humphrey / Ida M. Spasoff / Jenkin William Jones / Russell Arthur Oakley / Samuel Fortier / Theo. H. Scheffer / Timothy Paul White / William Renwick Beattie / James Herbert Beattie / H. S. Beardsley / United States. Department of Agriculture

CUB:U183020487824

Agriculture

Aaron Guy Johnson / Royal Joyslin Haskell / R. W. Leukel

UVA:X030353909

Grain

J. R. Holbert / William Leonidas Burlison / Aaron Guy Johnson

UIUC:30112019269999

Field crops

Harry Baker Humphrey

MINN:30000010157208

Agriculture

Harry Baker Humphrey

STANFORD:36105119569684

Take-all disease

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

George Nissley Hoffer / Aaron Guy Johnson / Dimitŭr Atanasov

LCCN:agr18000880

Aaron Guy Johnson / R. W. Leukel / Royal Joyslin Haskell

UVA:X030353884

Grain

OCLC:918057885

C. S. Reddy

OCLC:918319453

Aaron Guy Johnson / Alfred Theodor Wiancko / Charles Goodrich Woodbury / George Melrose Frier / John Blackler Abbott / Morris Wilford Richards / Otto Frederick Hunziker

UIUC:30112054434888

Agriculture

John A. Stevenson / Aaron Guy Johnson

OCLC:918456030

Albert Newton Steward / Ethel Ida Sanborn / Helen M. Gilkey / Maxwell Stanford Doty / Roderick Sprague / Aaron Guy Johnson

WISC:89049887615

Algae

Aaron Guy Johnson

OCLC:15265275

Wheat

Harry Baker Humphrey / Charles William Hungerford / Aaron Guy Johnson

OCLC:1029955874

Aaron Johnson / Deb Cleveland

1449700292 / 9781449700294

Biography & Autobiography

J. R. Holbert / William Leonidas Burlison / United States. Department of Agriculture / Aaron Guy Johnson

OCLC:1050752466

Field crops

Joseph Charles Arthur / Purdue University. Agricultural Experiment Station / Aaron Guy Johnson

OCLC:25178547

Cereal smut diseases

R. W. Leukel / James Geere Dickson / Aaron Guy Johnson

LCCN:agr33000025

Barley leaf stripe disease

Harry Baker Humphrey

OCLC:15244692

Cereal smut diseases

Ara Marcus Daniels / Caroline Louisa Hunt / G. Archie Russell / George Christian Edler / George Milton Warren / Harry Baker Humphrey / Russell Arthur Oakley

OCLC:13388628

Alfalfa

H. H. MacKinney / Aaron Guy Johnson

OCLC:918160598

United States. Bureau of Animal Industry / Walter Joseph Gibbons / United States. Department of Agriculture / Aubrey McDaniel Lee / Aaron Guy Johnson / William Orrin Robinson

OCLC:63216534

X disease in cattle

Leo Blynn Scott / Walter Ernest Fleming

OCLC:16707116

Corn

Alfred Theodor Wiancko / Charles Goodrich Woodbury / Joseph Charles Arthur / Otto Frederick Hunziker / Purdue University. Agricultural Experiment Station

OCLC:25178547

Agriculture

Aaron Guy Johnson

OCLC:17591174

Barberries

Aaron Guy Johnson / Purdue University. Agricultural Experiment Station

OCLC:632052053

Canada thistle

Aaron Johnson / Jamie Buckingham

0800786254 / 9780800786250

Conversion

Roderick Sprague / Aaron Guy Johnson

LCCN:50062673

Grasses

Aaron Guy Johnson / R. W. Leukel / Royal Joyslin Haskell

STANFORD:36105019613186

Grain