Devonian rocks of southeastern Michigan and northwestern Ohio,
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| Author / Creator: | Ehlers, George Marion, 1891- |
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| Imprint: | [Ann Arbor? 1951] |
| Description: | 40 p. illus. 28 cm. |
| Language: | English |
| Subject: | |
| Format: | Print Book |
| URL for this record: | http://pi.lib.uchicago.edu/1001/cat/bib/3218926 |
| Physical Description: | 40 p. illus. 28 cm. |
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