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Bulletin

Hatch Experiment StationMoffat Patrick WitheringtonRobert D. PerlackRobert L. StinsonRobert Lawrence ChristensenWilliam S. AmesRichard Warren Smith

出版	Massachusetts Agricultural Experiment Station, University of Massachusetts at Amherst, College of Food and Natural Resources, 1978
URL	http://books.google.com.hk/books?id=HLxQAQAAMAAJ&hl=&source=gbs_api