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1Published 1994“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
Government Document Conference Proceeding Microform Book -
2Published 1989“...Dept. of the Interior, U.S. Geological Survey ;...”
Government Document Conference Proceeding Book -
3Published 1988“...U.S. Dept. of the Interior, Geological Survey :...”
Government Document Conference Proceeding Microform Book