- Publication venue
- Illinois State Geological Survey
- Publication date
- 01/01/1968
- Field of study
Ope
- Publication venue
- Illinois State Geological Survey
- Publication date
- 01/01/1970
- Field of study
Ope
- Publication venue
- Illinois State Geological Survey
- Publication date
- 01/01/1969
- Field of study
Ope
- Publication venue
- Illinois State Geological Survey
- Publication date
- 01/01/1968
- Field of study
Ope
- Publication venue
- Illinois State Geological Survey
- Publication date
- 01/01/1970
- Field of study
Ope
- Publication venue
- Urbana : Illinois State Geological Survey,
- Publication date
- 01/01/1974
- Field of study
Cover title.Includes bibliographical references
- Publication venue
- Urbana : Illinois State Geological Survey,
- Publication date
- 01/01/1973
- Field of study
Cover title.Includes bibliographical references (p. 15-16)
- Publication venue
- Urbana, Ill. : Illinois State Geological Survey
- Publication date
- 01/01/1966
- Field of study
- Publication venue
- Urbana : Illinois State Geological Survey,
- Publication date
- 01/01/1967
- Field of study
Cover title.Includes bibliographical references (p. 8)