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Characteristic Marking Secretions of the Forms Lapponicus and Scandinavicus of Bombus Lapponicus Fabr. (Hymenoptera, Apidae)

Gunnar BergströmBo G. Svensson

出版	Göteborg Univ., 1973
URL	http://books.google.com.hk/books?id=LflmYgEACAAJ&hl=&source=gbs_api