The Helderberg Group and the position of the Silurian-Devonian boundary in North America /
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| Main Author: | |
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| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Washington, D.C. :
United States Department of the Interior, Geological Survey,
1964.
|
| Series: | Geological Survey bulletin ;
1180-B. |
| Subjects: | |
| Online Access: | CONNECT |
| Item Description: | Title from title screen (viewed July 24, 2014). Additional title page description: "A historical summary including a review of pertinent literature." |
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| Physical Description: | 1 online resource (iii, 19 pages) : map, charts. |
| Bibliography: | Includes bibliographical references (pages 18-19). |
