Notes: | Relief shown by shading and spot heights. "Supplement to National Geographic, December 1994." "Research: Andrew J. Wahll ; design: Sally S. Summerall ; relief : John A. Bonner ; art: Greg Harlin ; compilation: Barbara G. Carrigan ... ." Includes historical notes, location map, and list of geographical abbreviations. Text, col. ill., and map of immigrant patterns on verso. On verso: 1. 1500-1760, Indians and the fur trade -- 2. 1760-1870, European competitors -- 3. 1870-1914, steel rails and settlers -- 4. 1914-present, wheat, wheat, and more wheat -- 5. Prairie bounty.
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