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  1. 1
    Petrology of the Nepheline and Corundum rocks, Bancroft Area, Eastern Ontario.

    Petrology of the Nepheline and Corundum rocks, Bancroft Area, Eastern Ontario. by Hewitt, Donald F.

    Published 1953
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  2. 2
    Paleozoic geology of southern Ontario : showing bedrock industrial mineral producers /

    Paleozoic geology of southern Ontario : showing bedrock industrial mineral producers /

    Published 1972
    Other Authors: “…Hewitt, Donald F.…”
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