(1971). United Nations Symposium on the development and utilization of geothermal resources, Pisa, Italy 22 September to 1 October 1970. New York: [s.n.].
Chicago Style CitationUnited Nations Symposium On the Development and Utilization of Geothermal Resources, Pisa, Italy 22 September to 1 October 1970. New York: [s.n.], 1971.
MLA CitationUnited Nations Symposium On the Development and Utilization of Geothermal Resources, Pisa, Italy 22 September to 1 October 1970. New York: [s.n.], 1971.
Warning: These citations may not always be 100% accurate.