Aaron G. Nelson / D. F. Fisher / Albert Oliver Rhoad / Alonzo Clayton Davis / Archie Hugh Madden / Colburn Charles Fifield / D. E. Fox / Dwight David Smith / Ernst Artschwager / George W. Barber / Gustav A. Wiebe / Harold Lamont Borst / L. H. Patch / L. Jay Atkinson / Leander D. Howell / Louis Jay Ducoff / Michael H. Langford / Norma Lenys Pearson / Paul Bruce Marsh / Paul Lewis Harding / Perley Spaulding / W. B. Cartwright / Walter Whittier Swett / Wilbur Tibbils Pentzer / William Henry Black / A. G. McCall / Charles Vinyard Wilson / Clyde Eugene Asbury / Frank Shirley Chamberlin / John W. Klein / Joseph Conrad Chamberlin / Merle T. Jenkins / Philip Russell Cowan / R. B. Carr / R. G. Shands / R. T. Everly / Forrest G. Bell / James Robert Douglass / Lucille Reinbach-Welch / W. R. Barger

OSU:32435027440940

Agricultural wages

E. Grebenik / Jean-Louis Dechesne / Lolagene C Coombs / Althea Hill / María-Victoria Tobón

UIUC:30112042168697

Birth control

Louis Joseph Ducoff / Margaret Jarman Hagood

OCLC:682809893

Agricultural laborers

Social Science Research Council (U.S.). Committee on Labor Market Research / Louis Joseph Ducoff / Margaret Jarman Hagood

OCLC:844588470

Labor supply

Louis Joseph Ducoff

OCLC:60403206

Agriculture

Louis Joseph Ducoff

OCLC:636508801

Arthur Hawkins / Arthur W. Dewey / Benjamin Arthur Bourne / C. J. Zwick / Charles F. Helmboldt / Don Kawasaki / Edwin Pierce Singsen / George G. Judge / George K. Brinegar / H. L. Wildasin / Harold G. Halcrow / Irving F. Fellows / Patricia MacLeod / Robert G. Burnight / Storrs Agricultural Experiment Station / Thomas Clinton Morrison / Van Pelt, M. D. / Walter Cecil McKain / Louis Joseph Ducoff / Nathan Laselle Whetten / Elmer D. Baldwin

UIUC:30112099524180

Agricultural experiment stations

D. J. Hagedorn / D. S. MacLachlan / Eugene A. Wilkening / Henry Harrison Bakken / Hugh L. Cook / J. F. Darby / Margaret Jarman Hagood / R. L. Self / Raymon Ellis Webb / William H. Sewell

UIUC:30112019935912

Agriculture

Louis Joseph Ducoff / Margaret Jarman Hagood

OCLC:1452138575

Agricultural productivity

Louis Joseph Ducoff

OCLC:48286928

Louis Joseph Ducoff / Louis J. Ducoff

UOM:39015015212643

Central America

Social Science Research Council (U.S.)

OCLC:610229678

Arthur W. Dewey / Donald O. Hammerberg / Erwin Leopold Jungherr / Irving F. Fellows / Stanley K. Seaver / Walter Cecil McKain / Louis Joseph Ducoff / Elmer D. Baldwin

OCLC:19036941

Cigars

Louis Joseph DUCOFF

OCLC:1128362461

Joe Rankin Motheral

UIUC:30112019877627

Agricultural laborers

Louis Joseph Ducoff

OCLC:869578079

Agricultural laborers