oil regions of Pennsylvania.
Subtitle: Showing where petroleum is found; how it is obtained, and at what cost ...
By: By William Wright.
Series: American culture series -- 291.6.
Publisher: Harper
Place of publication: New York
Language: eng
Number of pages: 275
Subjects: Petroleum -- Pennsylvania
Notes: Microfilm. Ann Arbor, Mich., University Microfilms [n.d.] (American culture series, Reel 291.6)