Catalog of recent echinoid type specimens in the U.S. National Museum Smithsonian Institution and the Museum of Comparative Zoology Harvard University
Downey, M.E. (1968). Catalog of recent echinoid type specimens in the U.S. National Museum Smithsonian Institution and the Museum of Comparative Zoology Harvard University. Bulletin of the United States National Museum, 264. Smithsonian Institution: Washington D.C.VI, 99 pp. https://dx.doi.org/10.5479/si.03629236.264
Deel van: Bulletin of the United States National Museum. Smithsonian Institution: Washington. ISSN 0362-9236, meer
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