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Effect of DDT on the Sweetpotato Weevil

K. L. CockerhamPerry Kips HarrisonO. T. Deen

出版	U. S. Department of Agriculture, Agricultural Research Administration, Bureau of Entomlogy and Plant Quarantine, 1946
URL	http://books.google.com.hk/books?id=zto8MwEACAAJ&hl=&source=gbs_api