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| Formato: | Libro |
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| Lenguaje: | inglés |
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| era | |
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| format | Book |
| genre | |
| geographic | |
| id | 2ff7a5f3-ec45-451c-a0e3-e6947abd4896 |
| isbn | |
| issn | |
| language | eng |
| physical | 17 pages, 3 leaves of plates :illustrations, map ;27 cm |
| publication | – publisher: US Department of the Interior Bureau of Mines dateOfPublication: 1949 |
| publishDate | 1949 |
| subjects | |
| title | Investigation of the Benjamin Franklin graphite mine (government owned) and the Just graphite mine, Chester County, Pa. / by Robert S. Sanford and Frank D. Lamb. |
| topic | Graphite Graphite industry Graphite. Graphite industry. Pennsylvania |