Ruth Van Deman
William Klauer-Klattowski
Lohrman Seed Co
United States. Agricultural Research Service
Storrs & Harrison Co
United States. Department of Agriculture. Division of Publications. Press Service
Royal Palm Nurseries
Pearcy Bros. Nursery
Russell-Heckle Seed Co
W. A. Lloyd
Chester Pilch
United States. Agricultural Adjustment Administration
United States. Agricultural Adjustment Administration. Western Division
Don Paarlberg
United States. Soil Conservation Service
Robert J. Sawyer
United States. Agricultural Research Service. Northeastern Region
United States. Soil Conservation Service
C.G. Boerner (Firm)
R.D. Blackmore
Flaggen Sammler
Hôtel Drouot.
P.-L. Mastraeten (Firm)
P.-L. Mastraeten (Firm)
Soule Art Company
Thos. E. Kirby & Co
Art Gallery of Edward Schenck
Great Britain. Parliament. House of Lords. Science and Technology Committee
Irene Trimble
Massachusetts. Metropolitan Area Planning Council
Juan Eugenio Morant y Gurmatches
United States. Agricultural Research Service. Farm Economics Research Division
Levi M. Thomas
United States. Congress. House. Committee on Rules
Lacy Porter McColloch
Alexander Julius Torquatus
Hieronymus van Alphen
William Cunninghame
Sylvester Judd
Jaroslav J. Zmrhal
Anderson Galleries, Inc
John O. Stivers
Frederick Gordon Bonser
M Evan Wolkenstein
Francis James Cavanagh
Janet Hamilton Graham
Martin Waldseemüler
John Webster
United States. Bureau of Agricultural Economics
Gemma Majonchi
Karl Roland Schmittbetz