Author
Colorado Agricultural College. Extension Service
58
Colorado A & M College. Extension Service
21
Colorado State College (Fort Collins, Colo.). Extension Service
16
South Dakota Agricultural Experiment Station
16
Colorado Agricultural Experiment Station
6
United States. National Archives and Records Service
6
Iowa Agriculture and Home Economics Experiment Station
4
Iowa State University. Cooperative Extension Service
4
Ohio State University. Department of Agricultural Economics and Rural Sociology
4
Université de Paris
4
Argentina. Ministerio de Agricultura
3
Arkansas Agricultural Experiment Station
3
Indian Council of Agricultural Research
3
United States. Census Office
3
United States. Department of Agriculture
3
University of Tennessee (Knoxville campus). Agricultural Extension Service
3
Universität zu Köln
3
Brazilian Government Document Digitization Project
2
Emmons, Ebenezer, 1799-1863
2
Faculté de droit de Paris
2
Future Farmers of America. Kansas Association
2
Idaho Agricultural Experiment Station
2
Iowa State College. Agricultural Experiment Station
2
Iowa State College. Agricultural and Home Economics Experiment Station
2
Iowa State University. Agricultural and Home Economics Experiment Station
2
Mexico
2
Mississippi Agricultural Experiment Station
2
National Grange
2
New Mexico State University of Agriculture, Engineering, and Science. Agricultural Extension Service
2
New Mexico State University of Agriculture, Engineering, and Science. Cooperative Extension Service
2
North Dakota Agricultural Experiment Station (Fargo)
2
Ohio Agricultural Experiment Station
2
Ohio State University. Cooperative Extension Service
2
Purdue University. Agricultural Extension Service
2
Purdue University. Department of Agricultural Extension
2
South Dakota State University. Cooperative Extension Service
2
South Dakota State University. Rural Sociology Department
2
Tuskegee Institute
2
United States. Census Office. 6th Census, 1840
2
United States. Census Office. 6th census, 1840
2
Universidad de la República (Uruguay). Facultad de Agronomía
2
University of Arkansas (System). Cooperative Extension Service
2
University of Nebraska--Lincoln. Agricultural Experiment Station
2
Université d'Alger
2
Vsesoi︠u︡znyĭ institut rastenievodstva (Soviet Union)
2
African Training and Research Centre for Women
1
Agricultural Research Institute (Pakistan). Agricultural Bio-Chemistry Section
1
Aguayo Spencer, Rafael, 1914-
1
Agustín, Antonio, 1517-1586
1
Akademii︠a︡ nauk SSSR. Otdelenie istorii
1
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