Near-surface anomalies associated with faults and gas accumulations in western Pennsylvania
By: by Alan A. Roberts and John B. Roen
Contributors: Roen, John B; Geological Survey (U.S.)
Series: Open-file report -- 85-546; U.S. Geological Survey open-file report -- 85-546
Publisher: U. S. Dept. of the Interior, Geological Survey
Published: 1985
Place of publication: [Reston, Va.?]
Language: eng
Format: Microform
Subjects: Helium -- Pennsylvania; Gases in rocks; Soil air
Notes: Distributed to depository libraries in microfiche

Bibliography; p. 22-23

Microfiche. [Denver, Colo. : U.S. Geological Survey, 1985]. 1 microfiche ; 11 x 15 cm