Clark, A. H. (1947). Echinoderms from the Pearl Islands, Bay of Panama, with a revision of the Pacific Species of the Genus Encope. Smithsonian Miscellaneous Collections. 106: 1-11.
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Clark, A. H.
1947
Echinoderms from the Pearl Islands, Bay of Panama, with a revision of the Pacific Species of the Genus <i>Encope</i>