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Charles Taylor Vorhies, Earl Booth Working, Frederick Gibson, Herbert Christian Hanson, James Frank Breazeale, Paul Steere Burgess, Ralph Sams Hawkins, University of Arizona. Agricultural Experiment Station, Walter Penn Taylor · Yayınevi bilinmiyor
444 sayfa · 1922
Agriculture
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Agricultural cooperative credit associations
Charles Vancouver Piper, Edward Ralph Lake, Elton Fulmer, George P. Lilley, John O'B. Scobey · Yayınevi bilinmiyor
524 sayfa · 1892
Agricultural experiment stations
Anatol Roshko, Donald C. Cheatham, Evan A. Fradenburgh, I. E. Garrick, John P. Campbell, Kenneth B. Amber, Milton D. Dyke, Norris F. Dow, Wilmer H. Reed (III.), United States. National Advisory Committee for Aeronautics, Charles E. Watkins, Charles Libove, DeMarquis D. Wyatt, Marion O. McKinney, Ralph E. Hubka · Yayınevi bilinmiyor
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Aerial spraying and dusting in agriculture
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Ralph E. Campbell, Rocky Mountain Forest and Range Experiment Station (Fort Collins, Colo.) · Yayınevi bilinmiyor
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