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Swine Breeding Research at the Regional Swine Breeding Laboratory

William Arthur Craft

出版	U.S. Department of Agriculture, 1943
URL	http://books.google.com.hk/books?id=9P3hLojX7WkC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN

註釋

And conclusions. pp. 12.