1. Draft Proceedings Report: Net Energy Analysis Workshop,1975
2. 3uel's Paradise: energy options for Britain;Chapman,1975
3. C.W. Bullard, Net energy as a policy criterion (CAC document 154, Center for Advanced Computation, University of Illinois, Urbana-Champaign, Illinois 61801, USA).
4. Environment, Power, and Society;Odum,1971