Umpleby, Joseph Bertram (1883-1967) Jones, Edward L. Jr. Stany Zjednoczone. Geological Survey
Umpleby, Joseph Bertram (1883-1967) Westgate, Lewis Gardner (1868-1948) Ross, Clyde Polhemus (1891-1965) Hewett, Donnell Foster (1881-?) Stany Zjednoczone. Geological Survey