Cretaceous plants from southwestern Colorado.
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| Main Author: | |
|---|---|
| Corporate Authors: | , |
| Format: | Government Document Book |
| Language: | English |
| Published: |
Washington :
U.S. Govt. Print. Off,
1950.
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| Series: | Geological Survey professional paper ;
221-D. Shorter contributions to general geology ; 1949. |
| Subjects: |