Miser, Hugh Dinsmore (1884-1969) United States of America. Geological Survey.
Heald, Kenneth Conrad (1888-1971) Thom, William Taylor (1891-1979) Stany Zjednoczone. Geological Survey
Heald, Kenneth Conrad (1888-1971) Stany Zjednoczone. Geological Survey
White, David (1862-1935) Campbell, Marius Robinson (1858-1940) Stany Zjednoczone. Geological Survey