1925. Geological Survey (U.S.). Relief shown by spot heights.; Prime meridian: Greenwich.; Inset: [Aleutian and Andreanof Islands]. 42 x 59 centimeters Scale 1:5,000,000 approxima... The Survey (Washington, D.C).
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1899. Geological Survey (U.S.). Relief shown by contours, hachures and spot heights. Depths shown by soundings and isolines.; "The base is a copy of a portion of chart T of the U.... The Survey (Washington, D.C).