Ross, Clyde Polhemus (1891-1965) United States of America. Geological Survey.
Ross, Clyde Polhemus (1891-1965) United States of America. Geological Survey.
Ross, Clyde Polhemus (1891-1965) United States of America. Geological Survey.
Ross, Clyde Polhemus (1891-1965) United States of America. Geological Survey.
Ross, Clyde Polhemus (1891-1965) United States of America. Geological Survey.
Reeves, Frank (1886-1986) Ross, Clyde Polhemus (1891-1965) United States of America. Geological Survey.
Ross, Clyde Polhemus (1891-1965) Stany Zjednoczone. Geological Survey
Ross, Clyde Polhemus (1891-1965) Stany Zjednoczone. Geological Survey
Ross, Clyde Polhemus (1891-1965) Stany Zjednoczone. Geological Survey
Schrader, Frank Charles (1860-1944) Ross, Clyde Polhemus (1891-1965) Stany Zjednoczone. Geological Survey
Ross, Clyde P. (1891-1965) United States of America. Geological Survey.
Ross, Clyde P. (1891-1965) United States of America. Geological Survey.
Ross, Clyde P. (1891-1965) United States of America. 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