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1Published 1980Government Document Map
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2Published 1980Government Document Map
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3Coal resource occurrence map of the Laskie Draw quadrangle, Johnson and Campbell Counties, Wyoming /Published 1980Government Document Map
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4Coal resource occurrence map of the Negro Butte quadrangle, Johnson and Campbell Counties, Wyoming /Published 1980Government Document Map
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5Published 1980Government Document Map
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6Published 1980Government Document Map