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Rural America and the extension service : a history and critique of the cooperative agricultural and home economics extension service
Brunner, Edmund D., (1949)
Opplysningstjenesten i jordbruket i USA i 1963
Aamo, Eiliv Skogstad, (1953)
The County-agent
Baker, Gladys Lucille, (1939)
Processes of change affecting farm and family : a systemic approach
Wilkening, Eugene A., (1964)
Some perspectives on change in rural societies
Wilkening, Eugene A., (1968)