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1Published 1986“...U.S. Geological Survey,...”
Conference Proceeding Book -
2Published 1999“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
Government Document Conference Proceeding Microform Book -
3Published 1986“...U.S. Dept. of the Interior, Geological Survey,...”
Government Document Conference Proceeding Microform Book -
4Published 1988“...U.S. Dept. of the Interior, Geological Survey :...”
Government Document Conference Proceeding Microform Book -
5Published 1989“...U.S. Dept. of the Interior, Geological Survey ;...”
Government Document Conference Proceeding Microform Book -
6Published 1990“...U.S. Dept. of the Interior, Geological Survey,...”
Government Document Conference Proceeding Microform Book