Dalway J. Swaine
Geological Survey of Canada.
J. W Hamersma
R. E. Guyot
Hartmut Dressler
George C Sprunk
Nihon Enerugī Gakkai
James E. Callahan
P. Dharma Rao
Pennsylvania. Bureau of Topographic and Geologic Survey
James Morton Schopf
Rahul Biswas
United States. Bureau of Mines.
Unknown Author
Samir Ramzy Khalil
Carl Steven Weiss
Jag J. Singh
Václav Dušák
Přemysl Beran