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1
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2
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3Government Document Book
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4
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5Published 1979Government Document Book
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6Hydrology of area 49, northern Great Plains and Rocky Mountain coal provinces, Montana and Wyoming /Published 1983Government Document Book
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8
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9
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10
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11
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12Hydrology of area 48, northern Great Plains and Rocky Mountain coal provinces, Montana and Wyoming /Published 1986Government Document Book
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13Published 1988Government Document Book
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14
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15
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16
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17Published 1986Government Document Map
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18
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19
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20Published 1986Government Document Map