Whitmore, F. C., & Williams, M. E. (1982). Resources for the twenty-first century: Proceedings of the international centennial symposium of the United States Geological Survey, held at Reston, Virginia, October 14-19, 1979. U.S. Department of the Interior, U.S. Geological Survey.
Chicago Style (17th ed.) CitationWhitmore, Frank C., and M. E. Williams. Resources for the Twenty-first Century: Proceedings of the International Centennial Symposium of the United States Geological Survey, Held at Reston, Virginia, October 14-19, 1979. [Reston, Va.]: U.S. Department of the Interior, U.S. Geological Survey, 1982.
MLA (9th ed.) CitationWhitmore, Frank C., and M. E. Williams. Resources for the Twenty-first Century: Proceedings of the International Centennial Symposium of the United States Geological Survey, Held at Reston, Virginia, October 14-19, 1979. U.S. Department of the Interior, U.S. Geological Survey, 1982.