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Memoria / Argentina, Ministerio de Agricultura : correspondiente al ejercicio
(1947)
California dairy industry statistics : manufactured dairy products, milk production, utilization and prices
(1944)
Die Standardisierung landwirtschaftlicher und gartenbaulicher Erzeugnisse in den Vereinigten Staaten von Amerika und in Kanada
Ritter, Kurt, (1931)
A history of agricultural extension work in the United States, 1785 - 1923
True, Alfred Charles, (1969)
A history of agricultural experimentation and research in the United States 1607-1925 : including a history of the United States Department of agriculture
True, Alfred Charles, (1937)
A history of agricultural experimentation and research in the United States, 1607-1925
True, Alfred Charles, (1970)