The oil and gas fields of Pennsylvania
By: by George H. Ashley and J. French Robinson.
Contributors: Robinson, J. French, 1890- joint author.
Publisher: Dept. of Internal Affairs, Bureau of Topographic and Geological Survey
Published: 1922
Place of publication: Harrisburg
Language: eng
Subjects: Petroleum -- Pennsylvania.; Natural gas -- Pennsylvania.
Notes: At head of title: Pennsylvania geological survey, fourth series.