Circular - Illinois State Geological Survey.
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| Previous Title: | Illinois State Geological Survey. Information circular. |
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| Corporate Authors: | , |
| Format: | Serial |
| Language: | English |
| Published: |
Urbana,
Illinois State Geological Survey.
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| Subjects: |
| Published: | 1- 1906- |
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| Item Description: | At head of title: State of Illinois, Department of Registration and Education. |
| Physical Description: | no. ill., plates, maps, diagrs. 24-28 cm. |
| ISSN: | 0073-506X |