1970
Geological Survey (U.S.)
1:2m
1930
US Geological Survey
1:500k
1883
War Department
1:770k
1898
A. Hoen & Co.
1980
Gerin, Marybeth
1912
1:500k
1827
Vandermaelen, Philippe, 1795-1869
1:2m
1909
United States. Alaska Road Commission
1:1m
1949
USAF
1:500k
1902
US Geological Survey
1:1m