1. Solid Waste Conversion to Energy: Current European and U.S. Practice;Alter,1980
2. Solid Waste Facts;Office of Solid Waste,1978
3. Fourth Report to Congress;Resource Recovery and Waste Reduction,1977
4. U.S. Bureau of the Census. 1970. Tables Hl, H2, PI, P4, P5, P6. Washington, D.C., Maryland, Virginia, SMSA. Census Tracts. U.S. Department of Commerce, Washington, D.C.
5. Refuse Collection Records for 1972–1976, furnished by Mr. Donald Douglas, City of Rockville, Department of Public Works, Rockville, Maryland, 20850.