Lupton, Charles Thomas (1878-1935) United States of America. Geological Survey.
Lupton, Charles Thomas (1878-1935) United States of America. Geological Survey.
Lupton, Charles Thomas (1878-1935) United States of America. Geological Survey.
Lupton, Charles Thomas (1878-1935) Condit, Daniel Dale (1886-?) United States of America. Geological Survey.
Hewett, Donnell Foster (1881-?) Lupton, Charles Thomas (1878-1935) United States of America. Geological Survey.
Woolsey, Lester Hood (1877-1961) Richards, Ralph Webster (1879-?) Lupton, Charles Thomas (1878-1935) United States of America. Geological Survey.