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  1. 1
    Structure of the post-Cambrian formations in the vicinity of Coal Creek, Colorado

    Structure of the post-Cambrian formations in the vicinity of Coal Creek, Colorado by Butler, Charles Richard

    Published 1950
    Thesis Microfilm Book
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  2. 2
    Structure of the post-Cambrian formations in the vicinity of Coal Creek, Colorado /

    Structure of the post-Cambrian formations in the vicinity of Coal Creek, Colorado / by Butler, Charles Richard

    Published 1950
    Thesis Book
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    Saved in:
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