Armstead, H. C. H. (1983). Geothermal energy: Its past, present and future contributions to the energy needs of man (2. ed.). Spon.
Chicago-Zitierstil (17. Ausg.)Armstead, Hugh Christopher H. Geothermal Energy: Its Past, Present and Future Contributions to the Energy Needs of Man. 2. ed. London [u.a.]: Spon, 1983.
MLA-Zitierstil (9. Ausg.)Armstead, Hugh Christopher H. Geothermal Energy: Its Past, Present and Future Contributions to the Energy Needs of Man. 2. ed. Spon, 1983.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.