1914. National Geographic Society (U.S.). Cartographic Division. Inset: Western extension of Aleutian Islands; l:7,500,000.; Supplement to February, 1914 issue of The National Geographic Magazine.; "The Matthews-... The Society (Washington, D.C).
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1923. National Geographic Society (U.S.). Cartographic Division. Relief shown by gradient tints.; "Engraved and printed by Redfield-Kendrick-Odell Co., Inc., New York."; Insets: Seattle.--Portland.--San Francisco... The Society (Washington, D.C).