1. Nation Gas Supply and Demand 1971–1990;Federal Power Commission,1972
2. Biological Production of Methane from Organic Materials (Biomethane Project);Christopher;United Aircraft Research Laboratories, UARL K 96096-13,1971
3. Comprehensive Studies of Solid Waste Management;Golueke,1969
4. Ad Hoc Committee on Solid Waste Management;Office of Science and Technology,1969
5. Agricultural Productivity