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The Action of Arsenical Dips in Protecting Cattle from Infestation with Ticks

Harry Webster Graybill

出版	U.S. Department of Agriculture, Bureau of Animal Industry, 1913
URL	http://books.google.com.hk/books?id=q-OWvQEACAAJ&hl=&source=gbs_api

註釋

Pp. 5.