00998cam a22002531 4500 gs 11000344 DLC 20260227111311.0 790510s1910 paubf 000 0 eng c gs 11000344 (OCoLC)4951260 U. S. Geol. survey. Library ICIU OCoLC DLC premarc GA61.P4 A5 no. 1 Munn, Malcolm John, 1874- . Geology of the oil and gas fields in Sewickley quadrangle, by M. J. Munn. Surveyed in co-operation with the United States Geological survey. Harrisburg, C. E. Aughinbaugh, printer to the stae of Pennsylvania, 1910. 172 p. . pl. (part fold., incl. maps) fold. tab. 24 cm. Pennsylvania. Topographic and geologic survey. Report no. 1 "Introduction, by I. C. White": p. 13-23. Petroleum Geology Pennsylvania. Natural gas Pennsylvania. Geological Survey (U.S.) 25044 25044