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6Published 1998Government Document Microform Book
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7
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8Published 1999Government Document Book
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12Published 1994Government Document Microform Book
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13by Brocher, Thomas Mark, 1954-List of USGS open-file reports by year from which a link may be made to the title desired
Published 1998
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14Published 1998Government Document Microform Book
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18Published 1998Government Document Microform Book
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