Limited (search only) Illinois State Geological Survey / Open File Series No. 1979-1
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University of Illinois at Urbana-Champaign
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Limited (search only) Illinois State Geological Survey / Open File Series No. 1980-1
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University of Illinois at Urbana-Champaign
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Limited (search only) Illinois State Geological Survey / Open File Series No. 1981-1
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University of Illinois at Urbana-Champaign
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Limited (search only) Illinois State Geological Survey / Open File Series No. 1982-1
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University of Illinois at Urbana-Champaign
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Limited (search only) Illinois State Geological Survey / Open File Series No. 1983-1
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University of Illinois at Urbana-Champaign
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Limited (search only) Illinois State Geological Survey / Open File Series No. 1984-1
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University of Illinois at Urbana-Champaign
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Limited (search only) Illinois State Geological Survey / Open File Series No. 1985-1
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University of Illinois at Urbana-Champaign
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Limited (search only) Illinois State Geological Survey / Open File Series No. 1986-1
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University of Illinois at Urbana-Champaign
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Limited (search only) Illinois State Geological Survey / Open File Series No. 1987-1
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University of Illinois at Urbana-Champaign
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Limited (search only) Illinois State Geological Survey / Open File Series No. 1988-1
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University of Illinois at Urbana-Champaign
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Limited (search only) Illinois State Geological Survey / Open File Series No. 1989-4
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University of Illinois at Urbana-Champaign
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