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- [22] WATER USE IN WEST VIRGINIA FOR 1981. Circular - West Virginia Geological and Economic Survey, 1984, (C-33):
- [24] SIGNIFICANT ACHIEVEMENTS IN THE PLANETARY GEOLOGY PROGRAM, 1981. NASA Contractor Reports, 1982,
- [25] INTERNATIONAL SYMPOSIUM DIGEST - ANTENNAS AND PROPAGATION, 1981. IEEE Antennas and Propagation Society, AP-S International Symposium (Digest), 1981,
- [26] OIL AND GAS DEVELOPMENTS IN SOUTH TEXAS IN 1981. American Association of Petroleum Geologists Bulletin, 1982, 66 (11): : 1833 - 1839
- [27] PROCEEDINGS - ANNUAL RELIABILITY AND MAINTAINABILITY SYMPOSIUM, 1981. Proceedings of the Annual Reliability and Maintainability Symposium, 1981,
- [28] OIL AND GAS DEVELOPMENTS IN NORTHERN ROCKIES IN 1981. American Association of Petroleum Geologists Bulletin, 1982, 66 (11): : 1809 - 1826
- [29] OIL AND GAS DEVELOPMENTS IN FAR EAST IN 1981. American Association of Petroleum Geologists Bulletin, 1982, 66 (11): : 2360 - 2482
- [30] DIGEST OF PAPERS - INTERNATIONAL TEST CONFERENCE, 1981. Proceedings of the ASIS Annual Meeting, 1981,