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Structural Characteristics and Costs of Producing Sheep in the Northcentral States, 1975

C. Kerry GeeRoy Neuman Van Arsdall

出版	U.S. Department of Agriculture, Economics, Statistics, and Cooperatives Service, 1978
URL	http://books.google.com.hk/books?id=UvvybzLGE2UC&hl=&source=gbs_api