Hewett, Donnell Foster (1881-?) Stany Zjednoczone. Geological Survey
Hewett, Donnell Foster (1881-?) Lupton, Charles Thomas (1878-1935) Stany Zjednoczone. Geological Survey
Hewett, Donnell Foster (1881-?) Stany Zjednoczone. Geological Survey
Hewett, Donnell Foster (1881-?) Katz, Frank James(1883-1930) Stose, George Willis (1869-1960) Miser, Hugh Dinsmore (1884-1969) Stany Zjednoczone. Geological Survey
Hewett, Donnell Foster (1881-?) 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