Lower Middle Devonian proetid trilobites from Michigan, southwestern Ontario, and northern Ohio.
| Main Author: | |
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| Format: | Book |
| Language: | English |
| Published: |
Ann Arbor :
University of Michigan Press,
1953.
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| Series: | Contributions from the Museum of Paleontology ;
v. 11, no. 2. |
| Subjects: |
| Item Description: | Cover title. |
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| Physical Description: | 11-31 pages : illustrations ; 24 cm. |
| Bibliography: | Bibliography: pages 26-27. |