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Wild Tobaccos (Nicotiana Trigonophylla Dunal and Nicotiana Attenuata Torrey) as Stock-poisoning Plants

Charles Dwight MarshA. B. ClawsonG. C. Roe

出版	U.S. Department of Agriculture, 1927
URL	http://books.google.com.hk/books?id=q1yXiaw2SiYC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN