Geology and mineral resources of the Herscher quadrangle /
| Main Author: | |
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| Format: | Book |
| Language: | English |
| Series: | Bulletin (Illinois State Geological Survey) ;
no. 55. |
| Subjects: |
| Item Description: | Maps folded in pocket. At head of title: State of Illinois. Department of registration and education. Division of the State Geological Survey. |
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| Physical Description: | 120 pages : illustrations |
| Bibliography: | Bibliographical foot-notes. |