Wells, Roger Clark (1877-1944) Stany Zjednoczone. Geological Survey
Wells, Roger Clark (1877-1944) Stany Zjednoczone. Geological Survey
Mills, Ronald Van Auken (1881-?) Wells, Roger Clark (1877-1944) Stany Zjednoczone. Geological Survey
Wells, Roger C. (1877-1944) United States of America. Geological Survey.