1.
|
Champaign, IL : Illinois State Geological Survey, 1985.
|
2.
|
Urbana : Illinois State Geological Survey, 1964.
|
3.
|
Washington : U.S. G.P.O. ; Denver, CO : For sale by U.S. Geological Survey, Information Services, 1996.
|
4.
|
Urbana : Illinois State Geological Survey, 1968.
|
5.
|
Champaign, Ill. (615 E. Peabody Dr., Champaign 61820) : Illinois State Geological Survey, 1990.
QE105 .A32 no. 136 QE654 |
Map It |
|
6.
|
Champaign, Ill. : Illinois State Geological Survey, 1990.
QE105 .A32 no. 133 QE535.2.U6 |
Map It |
|
7.
|
Urbana : Illinois State Geological Survey, 1976.
|
8.
|
Champaign, Ill. : Illinois State Geological Survey, 1989.
TN872.I3 I44 no.133 |
Map It |
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9.
|
Urbana, Illinois State Geological Survey, 1970.
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