"Origin and development of natural gas in Appalachian area."; "Price, Paul H. (Paul Holland), 1898-"; "Natural gas--Appalachian Region."; "Price, Paul H. (Paul Holland), 1898-"; "1940"; "Journal article reprint from: Producers Monthly, 1940:Oct."; ""; "P5763"; "pec"; "Natural gas--Appalachian Region."; "14256"; .