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Leaf and Crude Protein Percentages Among Strains of Some Forage Grasses

William R. KneeboneV. G. Heller

出版	Oklahoma A. & M. College, Division of Agriculture, Experiment Station, 1956
URL	http://books.google.com.hk/books?id=wG0pAQAAMAAJ&hl=&source=gbs_api