1877. Gamble, W. H. (William H.). Relief shown by hachures and spot heights.; Shows Minnesota counties as of 1873, cities and towns, railroads, and natural features.; At base of map... S. Augustus Mitchell (Philadelphia, Pa.?), 1877.
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1877. Date of copyright registration 1876. 22 x 16 inches General Minnesota Maps. Geo. F. Cram; Chicago.