Pennsylvanian of the northern mid-continent region,
| Main Author: | |
|---|---|
| Corporate Authors: | , |
| Format: | Conference Proceeding Book |
| Language: | English |
| Published: |
Washington,
U.S. Govt. Print. Off.,
1933
|
| Series: | International Geological Congress, 16th, United States, 1933. Guidebook 20: Excursion C-2
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| Subjects: |