Books by Ben Bereskin:
Books in the extended shelves:
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Bereskin, Ben: Central swine-testing and purebred-improvement programs in the United States (Agricultural Research Service, U.S. Dept. of Agriculture, 1973), also by Roger J. Gerrits and Robert Judson Davey (page images at HathiTrust)- Bereskin, Ben: Genetic evaluation of young boars and gilts for sow productivity. (U.S. Dept. of Agriculture, Agricultural Research Service, 1982), also by United States. Agricultural Research Service (page images at HathiTrust)
Find more by Ben Bereskin at your library, or elsewhere.