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Proceedings of a Workshop on Development of Mineral, Energy, and Water Resources and Mitigation of G

Workshop on Development of Mineral, Energy, and Water Resources and Mitigation of Geologic Hazards in Central America (1985 : Antigua, Guatemala)
[Washington, D.C.] : U.S. G.P.O. ; Denver, CO : Books and Open-File Reports Section, U.S. Geological Survey, 1987. 1987

Prospects for mineral resource assessments on public lands : proceedings of the Leesburg workshop

Leesburg Workshop (1985 : Leesburg, Va.)
Denver, CO : Dept. of the Interior, U.S. Geological Survey : Books and Open-File Reports Section, U.S. Geological Survey [distributor], 1986. 1986