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  1. Contributions to the micro-palæontology of the Cambro-Silurian rocks of Canada.
    By: Foord, Arthur H. - Jones, T. Rupert (Thomas Rupert), - Rüst, David, - Ulrich, Edward Oscar, - Geological and Natural History Survey of Canada. - Geological Survey of Canada
    Publication info: [Ottawa] :Geological and Natural History Survey of Canada,1883-1892
    Holding Institution: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
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