A monograph of the existing crinoids: 1. The Comatulids. Part 1
Clark, A.H. (1915). A monograph of the existing crinoids: 1. The Comatulids. Part 1. Bulletin of the United States National Museum, 82. United States Government Printing Office: Washington D.C.406, 17 plates pp.
Part of: Bulletin of the United States National Museum. Smithsonian Institution: Washington. ISSN 0362-9236, more
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