Bibliographic Information

A map of Northwestern United States and neighboring Canadian Provinces

prepared in the Cartographic Section of the National Geographic Society for the National Geographic Magazine ; Gilbert Grosvenor, editor

National Geographic Society, 1941

Cartographic Material(Map)

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Note

Scale 1:2,500,000

"James M. Darley, chief cartographer, culture by Apphia E. Holdstock, research by Wellman Chamberlin, physiography by John J. Brehm"

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