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A Revisional Study of the Bees of the Genus Perdita F. Smith, with Special Reference to the Fauna of the Pacific Coast (Hymoneptera, Apoidea)

Douglas Jay GouldEarle Gorton LinsleyEustorgio Cedeño MéndezLoren L. SchlottmanPedro W. WygodzinskyPhilip Hunter TimberlakeRobert O. SchusterGordon A. MarshJohn Winslow MacSwainPhilip Frederic Bonhag

出版	University of California Press, 1954
URL	http://books.google.com.hk/books?id=Fp_1wAEACAAJ&hl=&source=gbs_api