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The Agricultural Research Center of the United States Department of Agriculture
Bertha Francis Olsen, Harry Hutchinson Stage, Richard Jay Foote, Karl August Fox, Willard Wilson Yates, Claude M. Gjullin · Yayınevi bilinmiyor
876 sayfa · 1956
Agricultural extension work
Growth and Development with Special Reference to Domestic Animals
Claude Hibbard Hills, Conrad Harold Hammar, Ellis Ray Graham, Frederick Francis McKenzie, George W. Collier, Jesse Harold Neal, Samuel Brody · Yayınevi bilinmiyor
546 sayfa · 1938
Agricultural geography