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1Published 1985“...U.S. Dept. of the Interior, Geological Survey,...”
Government Document Microform Book -
2Published 1985“...U.S. Dept. of the Interior, Geological Survey :...”
Government Document Conference Proceeding Microform Book -
3Published 1987“...U.S. Dept. of the Interior, Geological Survey :...”
Government Document Microform Book