Oil and gas map of southwestern Pennsylvania, 1915
Publisher: W. S. Ray, State Printer
Published: 1916
Place of publication: Harrisburg, Pa
Language: eng
Number of pages: 22
Subjects: Petroleum -- Pennsylvania.; Natural gas -- Pennsylvania.
Notes: At head of title: Topographic and Geological Survey of Pennsylvania; Richard R. Hice, State Geologist.
Folded map laid in.