Geologic processes affecting the quality of the Upper Freeport coal bed, west-central Pennsylvania
By: by R.W. Stanton ... [et al.].
Contributors: Stanton, R. W.; Geological Survey (U.S.)
Series: Open-file report -- 86-173.; U.S. Geological Survey open-file report -- 86-173.
Publisher: U.S. Geological Survey
Published: 1986
Place of publication: [Reston, Va.?]
Language: eng
Format: Microform
Subjects: Coal -- Geology -- Pennsylvania -- Indiana County.
Notes: Distributed to depository libraries in microfiche.

Bibliography: leaves 21-22.

Microfiche. [Denver, Colo. : U.S. Geological Survey, 1986]. 1 microfiche ; 11 x 15 cm.