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Alfalfa Production Practices and Cost Comparisons

Charles E. RobertsonGeorge Wilbert BarrHarry EmbletonJames Greenlief BrownRubert Burley StreetsSamuel Emmett McGregorWilliam I. ThomasWilliam Thomas McGeorgeCharles Taylor Vorhies

其他書名	Salt River Valley
出版	Agricultural Experiment Station, University of Arizona, 1947
URL	http://books.google.com.hk/books?id=FIhRAQAAMAAJ&hl=&source=gbs_api