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3Published 1993“...Guidebook (University of Texas at Austin. Bureau of Economic Geology) ;...”
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4by Bebout, Don G.“...Report of investigations (University of Texas at Austin. Bureau of Economic Geology) ;...”
Published 1981
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5Published 1976“...Geological circular (University of Texas at Austin. Bureau of Economic Geology) ;...”
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7Published 1990Government Document Conference Proceeding Book
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