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Technical Bulletin

Adrian Raymond LegaultCarl Henry MetzgerColorado Agricultural Experiment StationDwight KoonceGeorge Anderson BeachGeorge Edwin MortonJ. J. CurtisLeslie B. DanielsLouis Ralph BryantOlaf F. LarsonOtto H. ColemanRalph Martin WeihingRaymond Terry BurdickRobert GardnerWilliam P. Kintzley

出版	Colorado State College, Colorado Experiment Station, 1937
URL	http://books.google.com.hk/books?id=oaVGDHJoXb4C&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN