1.
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Urbana : Illinois State Geological Survey, c1935.
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Urbana : Illinois State Geological Survey, c1936.
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3.
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4.
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5.
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Urbana, Illinois State Geological Survey, 1957.
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6.
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Urbana, Ill. : State of Illinois, Dept. of Registration and Education, Division of the State Geological Survey, 1953.
QE105 .A45 no.182 |
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7.
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8.
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Urbana : Illinois State Geological Survey, 1953.
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9.
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Springfield : Department of Mines and Minerals, 1951-
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10.
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