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  1. Der Grünsand von Aachen und seine Molluskenfauna / von Johannes Böhm.
    By: Böhm, Johannes,
    Publication info: Bonn,Universitäts-Buchdruckerei von C. Georgi,1885.
    Contributed by: Harvard University, MCZ, Ernst Mayr Library
    Subjects: Aachen  Germany  Greensand  Mollusks, Fossil  Paleontology  
    BHL Collections: Ernst Mayr Library of the MCZ, Harvard University
    View Book