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The Control of St. John's Wort (Hypericum Perforatum L. Var. Angustifolium D. C.) by Competing Pasture Plants

R. M. MooreAlec Brooke Cashmore

出版	H.E. Daw, government printer, 1942
URL	http://books.google.com.hk/books?id=AHdRAQAAIAAJ&hl=&source=gbs_api