A monograph of the east American scaphopod mollusks
Henderson, J.B. (1920). A monograph of the east American scaphopod mollusks. Bulletin of the United States National Museum, 111. Government Printing Office: Washington D.C.177 pp. https://dx.doi.org/10.5479/si.03629236.111.1
Part of: Bulletin of the United States National Museum. Smithsonian Institution: Washington. ISSN 0362-9236, more
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