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Geographic Changes in the Production of Cattle and Calves in the North Central Region

Armand BauerCarl Edmond OlsonGregory B. MulkernJonathan Dale AndersonRex W. CoxRonald Gordon FraaseDonald E. AndersonGordon W. ErlandsonLowell K. CookJerome E. Johnson

出版	North Dakota Agricultural Experiment Station, North Dakota State University of Agriculture and Applied Science, 1971
URL	http://books.google.com.hk/books?id=pspPAQAAMAAJ&hl=&source=gbs_api