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  1. Catalogue and synonymy of the genera, species and varieties of recent Mollusca described prior to January 1st, 1867. Part 4, Porcellanidæ, Amphiperasidæ /
    By: Roberts, S. R. - Academy of Natural Sciences of Philadelphia.
    Publication info: Philadelphia :Conchological Section of the Academy of Natural Sciences, [1869]
    Holding Institution: Smithsonian Libraries
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