1. Austin, J. C. (1981) “Transportation and Distribution of Geothermal Fluids” First Sino/U.S. Geothermal Resources Conference, Geo-Heat Centre, Klamath Falls, Oregon, U.S.A., p. 1–4.
2. “Geothermal District Heating”;Einarsson,1973
3. Balzhiser, J. K. (1981) “Geothermal Heat Exchangers” First Sino/U.S. Geothermal Resources Conference, Geo-Heat Centre, Klamath Falls, Oregon, U.S.A., p. 5–9.
4. Anderson, D. N. and Lund, J. W. (1979) “Direct Utilisation of Geothermal Energy: A Technical Handbook” Geothermal Resources Council Special Report No. 7, Davis, California, U.S.A.
5. “District Heating and Cooling for Energy Conservation”;Diamant,1981