Washington DC: GPO 1992. First Edition. First Printing. good. 59 wraps illus. maps. These proceedings were prepared by the U.S. Department of Agriculture U.S. Department of Commerce U.S. Department of Energy National Aeronautics and Space Administration and the U.S. Department of Transportation. Other agencies that participated included: U.S. Department of Defense U.S. Department of the Interior U.S. Department of Health and Human Services Environmental Protection Agency and the Office of Science and Technology Policy. GPO paperback