| Notes: | Relief shown by shading and spot heights.
"Supplement to the National Geographic, August 1986, page 146A, Vol. 170, no. 2."
"Twelfth in a series of seventeen maps."
Includes historical notes, lists of abbreviations, and "metric conversions."
Text, 4 maps showing boundary changes, U.S. map showing "Transcontinental railroads," and col. ill. on verso.
On verso: 1. Ca. 1500-1850, fur trade rivalries -- 2. 1850-1880, conquest-colonization -- 3. 1880-1910, abrupt change -- 4. 1910-1940, Pacific lumber empire -- 5. 1940-present, coming of age.
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