Carbonizing properties and petrographic composition of washed and unwashed Lower and Upper Kittanning bed coals from mines 72 and 73, Johnstown, Cambria County, Pa.

Bibliographic Details

Corporate Author:	United States. Bureau of Mines
Format:	Government Document eBook
Language:	English
Published:	[Washington] : [s.n.], 1939.
Subjects:	Carbon. Coal mines and mining. Geology. Pennsylvania.
Online Access:	Electronic resource (PDF)