 | Gotwald, William H. cn | (1) |
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 | Gotwald, William H. cn; Comparative morphological studies of the ants : with particular reference to the mouthparts (Hymenoptera: Formicidae) / William H. Gotwald, Jr. Ithaca, N.Y. : Cornell University Agricultural Experiment Station, New York State College of Agriculture, 1969. | |
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