Ashley, George Hall (1866-1951) Stany Zjednoczone. Geological Survey
Ashley, George Hall (1866-1951) Stany Zjednoczone. Geological Survey
Ashley, George Hall (1866-1951) United States of America. Geological Survey.
Ashley, George Hall (1866-1951) Hicks, William Brooks (1882-?) Bailey, Reginald K. Stany Zjednoczone. Geological Survey