Volmar, Erich (1887-1975)
Vlădeanu, Alexandru (1906- )
Landgraf, Hugo (1895-1946)
Ross, Clyde P. (1891-1965) United States of America. Geological Survey.
Müller, Friedrich von (1858-1941). Red. Seifert, Otto. Red.
Bessau, Willy. Oprac. Buchwald, Martin. Oprac. Hallamik, Ernst. Oprac. Beitzke, Günther (1909-2004). Oprac.
Eggert, Oskar (1896-1974)