1. D. A. Dreyfus, “Federal Energy Organization,” Staff Analysis pursuant to Senate Resolution 45, Serial No. 93–6 (92–41), Washington, D.C. (1973).
2. M. K. Hubbert, Sci. Am., 224(3): 68 (1971).
3. D. W. Brown, M. C. Smith, and R. M. Potter, “A New Method for Extracting Energy from ‘Dry’ Geothermal Reservoirs,” Los Alamos preprint, LA-DC-72–1157, Los Alamos, New Mexico (1972).
4. A. L. Austin, G. H. Higgins, and J. H. Howard, “The Total Flow Concept for Recovery of Energy from Geothermal Hot Brine Deposits,” Rept. UCRL-51366, Livermore, California (1973).
5. “Summary of Seminar on Geothermal Energy,” held at United Nations Headquarters, January 8–10, 1973, New York.