Grover, Nathan Clifford (1868-1956) Follansbee, Robert (1879-1952) Purton, Astley B. (1886-1962) Dickinson, W. E. United States of America. Geological Survey.
Grover, Nathan Clifford (1868-1956) McGlashan, Harry Deyoe (1879- ) Henshaw, Fred Forbes (1884-1933) United States of America. Geological Survey.
Grover, Nathan Clifford (1868-1956) Purton, Astley B. (1886-1962) McGlashan, Harry Deyoe (1879- ) Henshaw, Fred Forbes (1884-1933) Paulsen, Carl G. Follansbee, Robert (1879-1952) United States of America. Geological Survey.
Grover, Nathan Clifford (1868-1956) Baldwin, George Clyde (1884-1951) Parker, Glenn Lane (1884-1946) Paulsen, Carl G. Purton, Astley B. (1886-1962) Henshaw, Fred Forbes (1884-1933) United States of America. Geological Survey.
Grover, Nathan Clifford (1868-1956) Parker, Glenn Lane (1884-1946) Lamb, William Alfred (1881- ) United States of America. Geological Survey.
Grover, Nathan Clifford (1868-1956) Lamb, William Alfred (1881- ) Paulsen, Carl G. Follansbee, Robert (1879-1952) Spiegel, Jacob Birk Kinnison, Harvey Banks (1890- ) Beckman, Henry Claus (1888- ) United States of America. Geological Survey.
Grover, Nathan Clifford (1868-1956) Beckman, Henry Claus (1888- ) Follansbee, Robert (1879-1952) Kinnison, Harvey Banks (1890- ) Ellsworth, Clarence Eugene (1882- ) United States of America. Geological Survey.
Grover, Nathan Clifford (1868-1956) Ellsworth, Clarence Eugene (1882- ) Follansbee, Robert (1879-1952) United States of America. Geological Survey.
Grover, Nathan Clifford (1868-1956) Harrington, Arthur William (1888-1964) Horton, Albert Howard (1875-1945) Lee, Lasley (1887- ) Grosbach, H. E. King, Warren Raymond Burchard, E. D. United States of America. Geological Survey.
Grover, Nathan Clifford (1868-1956) Soulé, S. B. Grosbach, H. E. Lee, Lasley (1887- ) Harrington, Arthur William (1888-1964) Pierce, Charles Henry (1878- ) Kinnison, Harvey Banks (1890- ) United States of America. Geological Survey.
Grover, Nathan Clifford (1868-1956) Lamb, William Alfred (1881- ) Soulé, S. B. Spiegel, Jacob Birk Grosbach, H. E. Beckman, Henry Claus (1888- ) United States of America. Geological Survey.
Renick, Brink Coleman (1897- ) Riffenburg, Harry Buchholz (1891- ) United States of America. Geological Survey.
Grover, Nathan Clifford (1868-1956) Pierce, Charles Henry (1878- ) Kinnison, Harvey Banks (1890- ) Harrington, Arthur William (1888-1964) Hartwell, Oliver Whitcomb (1886- ) Horton, Albert Howard (1875-1945) United States of America. Geological Survey.
Grover, Nathan Clifford (1868-1956) Horton, Albert Howard (1875-1945) Burchard, E. D. King, Warren Raymond United States of America. Geological Survey.
Meinzer, Oscar Edward (1876-1948) United States of America. Geological Survey.
Hall, George Martin (1891-1941) Howard, Charles Spaulding (1896-1981) United States of America. Geological Survey.
Koenen, Adolf von (1837-1915)
Koenen, Adolf von (1837-1915)
Liebe, Karl Theodor (1828-1894)
Beushausen, Louis (1863-1904)
Blanckenhorn, Max (1861-1947)
Koch, Carl Jacob Wilhelm Ludwig (1827-1882)
Friedrich, Paul Alexander (1856-1918)
Roemer, Hermann (1816-1894)