Summary: secondary recovery operations in Pennsylvania to January 1, 1954
Subtitle: including petroleum reserves and production by counties.
Published: 1955
Place of publication: [Harrisburg]
Language: eng
Number of pages: 23
Subjects: Secondary recovery of oil -- Pennsylvania.
Other titles: Secondary recovery operations in Pennsylvania.
Notes: Bibliography: p. 16.
Cover title.
At head of title: Pennsylvania geological survey, 4th series.