Oil and gas developments in Pennsylvania in 1976 / William S. Lytle ... [et al.].William S. Lytle · First published 1977Open the Tome
Oil and gas developments in Pennsylvania in 1975 / William S. Lytle, Robert G. Piotrowski, Louis HeymanWilliam S. Lytle · First published 1976Open the Tome
Oil fields of the Greater Pittsburgh region / by William S. Lytle ; prepared by the Pennsylvania Geological Survey in cooperation with the United States Geological SurveyWilliam S. Lytle · First published 1976Open the Tome
Oil and gas developments in Pennsylvania in 1974 / by William S. Lytle.William S. Lytle · First published 1975Open the Tome
Oil and gas developments in Pennsylvania in 1973 / by William S. Lytle.William S. Lytle · First published 1974Open the Tome
Oil and gas developments in Pennsylvania in 1972 / William S. Lytle.William S. Lytle · First published 1973Open the Tome
Oil and gas developments in Pennsylvania in 1971 / by William S. Lytle, Louis Heyman.William S. Lytle · First published 1972Open the Tome
Oil and gas developments in Pennsylvania in 1970 / by William S. Lytle, Louis Heyman [and] Dana R. KelleyWilliam S. Lytle · First published 1971Open the Tome
Oil and gas developments in Pennsylvania in 1967 / by William S. Lytle, Louis Heyman, and Walter R. WagnerWilliam S. Lytle · First published 1968Open the Tome
Underground gas storage in Pennsylvania / by William S. Lytle.William S. Lytle · First published 1963Open the Tome
A summary of oil and gas developments in Pennsylvania, 1955 to 1959 / by William S. Lytle ... [et al.].William S. Lytle · First published 1961Open the Tome
Oil and gas geology of the Kinzua quadrangle, Warren and McKean Counties, PennsylvaniaWilliam S. Lytle · First published 1970Open the Tome
Oil and gas geology of the Warren quadrangle, PennsylvaniaWilliam S. Lytle · First published 1965Open the Tome
A summary of oil and gas developments in Pennsylvania, 1955 to 1959William S. Lytle · First published 1961Open the Tome
History, present status and future possibilities of secondary recovery operations in PennsylvaniaWilliam S. Lytle · First published 1960Open the Tome
Summary: secondary recovery operations in Pennsylvania to January 1, 1954William S. Lytle · First published 1955Open the Tome
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