Studies on a new species of toxoptera : with an analytical key to the geenus and notes on rearing methods
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Studies on a new species of toxoptera : with an analytical key to the geenus and notes on rearing methods
(Technical series / U.S. Department of Agriculture. Division of Entomology, no. 25 . Papers on aphididæ ; pt. 1)
Government Printing Office, 1912
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