Autor
United States. National Archives and Records Service
7
Iowa State College. Extension Service
5
Iowa State College. Agricultural Extension Service
2
Iowa State College. Extension Service. Rural Youth Section
2
Iowa Rural Young People's Assembly
1
Iowa State College. Cooperative Extension Service
1
Iowa Weather Service
1
Iowa Weather Service. Central Station
1
Jenkins, William Sumner, 1902-1978
1
National Archives Trust Fund Board
1
United States. Adjutant-General's Office
1
United States. Census Office
1
United States. Census Office. 10th census, 1880
1
United States. Federal Extension Service
1
United States. General Land Office
1
United States. Internal Revenue Service
1
University of North Carolina (1793-1962)
1