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Browse Illinois Mining Investigations - Illinois State Geological Survey by Title
Now showing items 27-33 of 33
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(Urbana. Ill.,, 1925)
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(Urbana : University of Illinois, 1913)
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PDF (6MB)
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PDF (9MB)
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(Urbana, Illinois State geological survey, University of Illinois,, 1916)
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PDF (10MB)
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(Urbana, Illinois State Geological Survey, University of Illinois,, 1917)
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PDF (9MB)
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(Urbana, Ill.,, 1918)
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PDF (2MB)
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(Urbana, Ill.,, 1919)
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PDF (2MB)
Now showing items 27-33 of 33