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Arthur Henry SennerBoyce D. EzellC. J. BabcockDavid Leroy YarnellEarl Dewey MallisonFrank M. EatonGeorge Thomas RatliffeHarry Vaughn HarlanHarry Waltner TitusHickman Charles MurphyHoward E. MiddletonHoward Vernon JordanHugh Hackland DarbyJ. I. LauritzenJames William ParkJohn Clifford ElmoreJohn Thomas LuckerLucy Maclay AlexanderMaulsby Willett BlackmanMortimer Reed LewisRoderick SpragueW. G. BradleyWalter Ernest FlemingWells Aleck HutchinsAlbert B. GodfreyAlonzo Clayton DavisCharles Lincoln PowellClarence Sheldon SlaterEleanor Muriel KappEmory Dwight BurgessFrancis Everett BakerHelmut Charles DiehlHurley FellowsNancy Griswold ClarkPhilip Russell CowanR. T. BalchRobert Archibald WorkHorace Greeley ByersRoy Elliott CampbellWillard Walker Aldrich

出版	U.S. Department of Agriculture, 1934
URL	http://books.google.com.hk/books?id=twzZzgEACAAJ&hl=&source=gbs_api