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Carey Eugene Vail
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Cilt sonuçları
Technical Bulletin
Carey Eugene Vail, Charles B. Gnadinger, Colorado Agricultural Experiment Station, Elwood H. Sheppard, John Lindemuth Hoerner, Lawrence Wood Durrell, Warren H. Leonard, William E. Code, Isaac Ernest Newsom, L. E. Evans, C. S. Corl · Yayınevi bilinmiyor
404 sayfa · 1936
Agricultural extension work