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  1. Amherst meeting of the Geological society of America, Palaeontological society, Mineralogical society of America, and Society of economic geologists December 28-30, 1921.
    By: Amherst College.
    Publication info: 1921.
    Contributed by: Harvard University, MCZ, Ernst Mayr Library
    BHL Collections: Ernst Mayr Library of the MCZ, Harvard University
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