An early Reticuloceras Zone fauna from the Hale Formation in northwestern Arkansas.
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| Format: | Government Document Book |
| Language: | English |
| Published: |
Washington :
U.S. Govt. Print. Off,
1968.
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| Series: | Geological Survey professional paper ;
613-A. Geological Survey professional paper. Contributions to paleontology. |
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| Physical Description: | iii, 21 pages, 6 unnumbered pages : illustrations, map. ; 29 cm. |
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| Bibliography: | Bibliography: pages 18-19. |