Petrography of American coals /
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| Other Authors: | |
| Format: | Book |
| Published: |
Washington, DC.:
U.S. Government Printing Office,
1956
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| Series: | Bulletin ;
550 |
| Subjects: |
| Physical Description: | viii, 193 p. : ill. ; 26 cm. |
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| Bibliography: | Includes bibliography and index. |