American hydroids: I. The Plumularidae
Nutting, C.C. (1900). American hydroids: I. The Plumularidae. Smithsonian Institution. United States National Museum. Special Bulletin, 4. Government Printing Office: Washington D.C. 285, XXXIV plates pp.
Part of: Smithsonian Institution. United States National Museum. Special Bulletin. Government Printing Office: Washington DC, more
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