Karl Ragnars 1941; Stefán Arnórsson 1942; Jón Steinar Guðmundsson 1947-2018; Karl Ómar Jónsson 1927-2014; Hitaveita Reykjahlíðar; Orkustofnun. Jarðhitadeild.(Orkustofnun, 1972)
Guðmundur Pálmason 1928-2004; Gunnar V. Johnsen 1949; Helgi Torfason 1949; Kristján Sæmundsson 1936; Karl Ragnars 1941; Guðmundur Ingi Haraldsson 1951; Gísli Karel Halldórsson 1950; Orkustofnun. Jarðhitadeild(Orkustofnun, 1985)
Sverrir Þórhallsson 1944; Karl Ragnars 1941; Stefán Arnórsson 1942; Hrefna Kristmannsdóttir 1944; Orkustofnun. Jarðhitadeild.; United Nations Symposium on the Development and Use of Geothermal Resources (2 : 1975 :San Francisco, Calif)(Orkustofnun, 1975)