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Cone and Seed Yields from Controlled Breeding of Southern Pines

E. B. Snyder

出版	Southern Forest Experiment Station, Forest Service, U.S. Department of Agriculture, 1966
URL	http://books.google.com.hk/books?id=MmXNsF8HY0cC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN