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A Comparison of Several Anthelmintics for the Control of Internal Parasites of Sheep

Gerald Clifton AndersonWest Virginia Agricultural Experiment StationJ. O. HeishmanJames Alexander Welch

出版	West Virginia University Agricultural Experiment Station, 1966
URL	http://books.google.com.hk/books?id=U2ExzgEACAAJ&hl=&source=gbs_api