Proceedings of the ninth Pennsylvania Mineral Industries Conference, Petroleum and Natural Gas Section, held at The Pennsylvania State College, April 26-27, 1940 / [sponsored by The Pennsylvania State College] in cooperation with The Pennsylvania Natural Gas Men's Association ... [et al.].
- Conference Author:
- Pennsylvania Mineral Industries Conference. (9th : 1940 : Pennsylvania State College)
- State College, Pa. : School of Mineral Industries, The Pennsylvania State College, 1940.
- Physical Description:
- ix, 66 pages : illustrations ; 23 cm.
- Additional Creators:
- Pennsylvania Natural Gas Men's Association
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