The coal fields of the United States /
| Main Author: | |
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| Other Authors: | |
| Format: | Government Document Book |
| Language: | English |
| Published: |
Washington :
U.S. Govt. print. off,
1929.
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| Series: | U.S. Geological Survey professional paper ;
100. |
| Subjects: |
| Item Description: | At head of title: Department of the interior. Issued also as House doc. number 1806, 64th Cong., 2d sess. |
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| Physical Description: | iv, 101 pages including tables, diagrams : illustrations, maps, (2 in pocket) folded tables ; 29 cm. |