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1Published 1991“...U.S. Geological Survey ;...”
Government Document Microform Book -
2by Owen-Joyce, Sandra J.“...U.S. Geological Survey, Dept. of the Interior,...”
Published 1992
Government Document Microform Book -
3by Wilson, Richard P.“...U.S. Geological Survey, Dept. of the Interior ;...”
Published 1993
Government Document Microform Book