1. Geothermal power for non-base load purposes;Armstead,1970
2. Geothermal economics;Armstead,1973
3. Geothermal energy: review of research and development,1973
4. Geothermal drillholes: physical investigations;Banwell,1961
5. Geothermal energy production from porous sediments in Hungary;Boldizsar,1970