Coal beds in Mercer, Crawford, Venango, Forest, Warren, McKean, Potter, Tioga and Bradford Counties, Pennsylvania
By: by J.D. Sisler
Contributors: Pennsylvania. Bureau of Topographic and Geologic Survey
Series: Bulletin -- no. 52
Publisher: Bureau of Topographic and Geological Survey
Published: 1922
Place of publication: [Harrisburg]
Language: eng
Subjects: Coal mines and mining
Notes: Pa. State Docs. class. no. PY G345/4.17/8:no. 52.

Typescript.

At head of title: Commonwealth of Pennsylvania, Department of Internal Affairs, Bureau of Topographic and Geological Survey.

September 15, 1922.