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1Published 1990Subjects: “...Mineral industries Illinois Periodicals....”
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2
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3Published 1968Subjects: “...Glacial epoch Illinois Congresses....”
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4Published 1932Subjects: “...Mineral industries Illinois Periodicals....”
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5Published 1932“...Circular (Illinois State Geological Survey)...”
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6Published 1978Subjects: “...Mineral industries Illinois Periodicals....”
Government Document Serial -
7
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8
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9
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10Published 1990Subjects: “...Mines and mineral resources Illinois Periodicals....”
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11
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12
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13
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14Published 1972Subjects: “...Paleolimnology Illinois....”
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15
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16Published 1974Subjects: “...Sediments (Geology) Illinois....”
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17Published 1976Subjects: “...Gravity Illinois....”
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18
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19
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20