The oil and gas fields of Pennsylvania ... by George H. Ashley and J. French Robinson.
|Main Author:||Ashley, Geo. H. b. 1866.|
|Related Names:||Robinson, J. French 1890-, joint author.|
Harrisburg, Dept. of internal affairs, Bureau of topographic and geological survey, 1922-
Petroleum > Pennsylvania.
At head of title: Pennsylvania geological survey, fourth series.
illus., fold. map., diagrs.
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