Author
North Dakota Agricultural College. Agricultural Extension Division
3
Iowa State College. Extension Service
1
Iowa State College. Extension Service. Agricultural Economics Section
1
N̄ogȳo S̄oḡo Kenkȳujo (Japan)
1
T̄oi, Kinpei, 1902-
1
United States. Bureau of Agricultural Economics
1
United States. National Archives and Records Service
1
Wiser, Vivian D.
1