Mineral resources of the Appalachian region.  by the U.S. Geological Survey and the U.S. Bureau of Mines
Contributors: U.S. Geological Survey; U.S.  Bureau of Mines
Publisher: U.S. Dept. of the Interior
Place of publication: Washington
Language: eng
Number of pages: 492
Subjects: Mines and mineral resources - U.S. - Appalachian region
Notes: 11