[Illustrations: Castleman Basin, Garrett County, Maryland]

Year:
Document Type:	N/A
SUDOC:	28.3:507
Series:	United States Bureau of Mines Reports
Report Number:	Bulletin 507
Subjects:	Coal mines and mining -- Maryland.
	Coal basins -- Maryland.
	Garrett County (Md.)
	Coal -- Geology -- Maryland -- Garrett County.
Link:	http://digital.library.unt.edu/ark:/67531/metadc12441/