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wilbur h seifert
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Oil and gas developments in the Youngsville-Sugar Grove field of Warren County, Pennsylvania
Wilbur H. Seifert · Dept. of Internal Affairs, Topographic and Geologic Survey
13 sayfa · 1963
Petroleum / Natural gas
Oil and gas field atlas of the Smethport quadrangle, Pennsylvania
Wilbur H. Seifert, Charles R. Fettke · Pennsylvania Dept. of Internal Affairs, Topographic and Geologic Survey
30 sayfa · 1951
Petroleum / Natural gas / Maps