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Echinoderms from the Pearl Islands, Bay of Panamá, with a Revision of the Pacific Species of the Genus Encope (with Four Plates)

其他書名	By Austin H. Clark
出版	Smithsonian Institution, 1946
URL	http://books.google.com.hk/books?id=txOxpcPwmBIC&hl=&source=gbs_api