Summary: secondary recovery operations in Pennsylvania to January 1, 1954 : including petroleum reserves and production by counties /

by Lytle, William S.
Harrisburg : Commonwealth of Pennsylvania, Topographic and Geological Survey, 1955

Summary: secondary recovery operations in Pennsylvania to January 1, 1954 : including petroleum reserves and production by counties.

by Lytle, William S.
[Harrisburg] : [publisher not identified], 1955

History, present status and future possibilities of secondary recovery operations in Pennsylvania.

by Lytle, William S.
[Harrisburg] : Dept. of Internal Affairs, 1960

Summary : secondary recovery operations in Pennsylvania to January 1, 1954 : including petroleum reserves and production by counties /

by Lytle, William S.
[Harrisburg, Pa.] : Commonwealth of Pennsylvania, Department of Internal Affairs, Bureau of Topographic and Geological Survey, 1955

Summary: secondary recovery operations in Pennsylvania to January 1, 1954, including petroleum reserves and production by counties.

by Lytle, William S.
[Harrisburg], 1955