1. Museo della Geotermia Larderello -Archlvlo Fotografico;Photograph courtesy of Enel S.p.A,2004
2. Characteristics of Geothermal Resources;White,1973
3. Planning of a Geothermoelectric Power Plant: Technical and Economic Principles;Chierici,1964
4. Chemistry and Geothermal Systems;Ellis,1977
5. Wairakei and Larderello: Geothermal Power Systems Compared;James;N. Z. J. Sci,1968