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Champaign, IL : Illinois State Geological Survey, [1992]
TN24.I3 I48, no. 109 |
Map It |
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2.
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Champaign, IL : Illinois State Geological Survey, 1990.
TN24.I3 I48, no.103 |
Map It |
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3.
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Champaign, Ill. : Illinois State Geological Survey, 1994.
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4.
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Champaign, Ill. : Illinois State Geological Survey, 1983.
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5.
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Champaign, IL : Illinois State Geological Survey, 1995.
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6.
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Urbana : Illinois State Geological Survey, 1978.
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7.
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Champaign, Ill. : Illinois State Geological Survey, 1981.
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