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Polymorphism in aphids, with particular reference to the influence of the hostplant on the development of alate and apterous forms in Aphis craccivora Koch (Homoptera : Aphididae) /Birks, P. R. January 1959 (has links) (PDF)
Thesis (Master of Ag. Sc.)--University of Adelaide, 1959. / Typewritten copy. Includes bibliographical references.
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