TY - BOOK AU - Armstead H., Christopher H. TI - Geothermal energy: its past, present and future contributions to the energy needs of man SN - 0-470-263 U1 - 621.44 PY - 1978/// CY - New York PB - John Willey and Sons KW - Geotermia KW - Energía Geotérmica KW - Recursos Geotérmicos N1 - 01215; Historical note. The versatility of earth heat. The heat energy resources of the earth. The nature and occurrence of geothermal fields ER -