Coal beds in Beaver County, Pennsylvania
By: by J.D. Sisler
Contributors: Pennsylvania. Bureau of Topographic and Geologic Survey
Series: Bulletin. Bureau of Topographic and Geologic Survey -- no. 57; Progress report (Pennsylvania. Bureau of Topographic and Geologic Survey) -- 57.
Publisher: Commonwealth of Pennsylvania, Dept. of Internal Affairs, Bureau of Topographic and Geological Survey
Published: 1921
Place of publication: [Harrisburg, Pa.]
Language: eng
Subjects: Coal mines and mining
Notes: Typescript.

Caption title.

October 30, 1921.