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Browse Circular - Illinois State Geological Survey by Subject "Coal - Geology - Illinois"
Now showing items 1-6 of 6
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(Champaign, Ill.: Illinois State Geological Survey, Prairie Research Institute., 1987)
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PDF (4MB)
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Map of the State of Illinois showing areal type classification for wells in the Illinois coal basin (Champaign, Ill.: Illinois State Geological Survey, Prairie Research Institute., 1942)
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PDF (161kB)
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(Champaign, Ill.: Illinois State Geological Survey, Prairie Research Institute., 1987)
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PDF (3MB)
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(Champaign, Ill.: Illinois State Geological Survey, Prairie Research Institute., 1965)
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PDF (6MB)
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(Champaign, Ill.: Illinois State Geological Survey, Prairie Research Institute., 1959)
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PDF (12MB)
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(Champaign, Ill.: Illinois State Geological Survey, Prairie Research Institute., 1961)
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PDF (18MB)
Now showing items 1-6 of 6