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  1. 1

    Mineral occurrences of the Guiana Shield, Venezuela by Sidder, Gary B.

    Published: U.S. Geological Survey, 1990
    Description: 28 pages : map ; 28 cm.
    Government Document Microfilm Book
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    Mineral occurrences of the Guiana Shield, Venezuela
  2. 2

    Geology, geochemistry, and mineral resources of the upper Caura River area, Bolivar State, Venezuela by Sidder, Gary B.

    Published: [Dept. of the Interior, Geological Survey], 1990
    Description: ii, 29 pages : illustrations ; 28 cm.
    Government Document Microfilm Book
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    Geology, geochemistry, and mineral resources of the upper Caura River area, Bolivar State, Venezuela

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