1. Increased Energy Economy and Efficiency in the ECE Region;ECE,1976
2. U.S. Energy Demand: Some Low Energy Futures
3. Soft Energy Paths: Toward a Durable Peace;Lovins,1977
4. Soft Energy Paths: Toward a Durable Peace;Levins,1979
5. The Energy Controversy: Soft Path Questions and Answers,1979