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Economic Portions Of Del Norte And Siskiyou Counties, Northwesternmost California
$16.54Sylvanite, Inc
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Geology And Mineral Deposits Of The Colfax And Forsthill Quadrangles, California
$20.91Sylvanite, Inc
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Geology of Lode Gold Districts in the Klamath Mountains, California and Oregon
$20.85Sylvanite, Inc
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Gold Placers and Their Geologic Environment in Northwestern Park County, Colorado
$15.39Sylvanite, Inc
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