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)
Axel Björnsson 1942; Gunnar V. Johnsen 1949; Sven Þ. Sigurðsson 1945; Gunnar Þorbergsson 1929-2015; Eysteinn Tryggvason 1924; Orkustofnun. Jarðhitadeild.(Orkustofnun, 1978)