Brackenridge, Henry Marie (1786-1871)
Matson, George Charlton (1873-?) Hopkins, Oliver Baker Stany Zjednoczone. Geological Survey Hopkins, Oliver Baker
Matson, George Charlton (1873-?) Stany Zjednoczone. Geological Survey
Burchard, Ernest Francis (1875-1961) United States of America. Geological Survey.
Matson, George Charlton (1873-?) United States of America. Geological Survey.