Ross, Clarence Samuel (1880-1975) United States of America. Geological Survey.
Ross, Clarence Samuel (1880-1975) United States of America. Geological Survey.
Ross, Clarence Samuel (1880-1975) Stany Zjednoczone. Geological Survey
Miser, Hugh Dinsmore (1884-1969) Ross, Clarence Samuel (1880-1975) Stany Zjednoczone. Geological Survey
Miser, Hugh Dinsmore (1884-1969) Ross, Clarence Samuel (1880-1975) Stany Zjednoczone. Geological Survey