1872. Winchell, N. H. (Newton Horace), 1839-1914. 22 x 17 inches General Minnesota Maps. [s.n.]; United States.
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1872. Winchell, N. H. (Newton Horace), 1839-1914. Geologic map of Minnesota, scale 1 inch = 20 miles. Minnesota Geological Survey.
1872. Rice, G. Jay. Finished railroads and railroads under construction shown in red.; "Published for the State Railroad Commissioner."; "Entered according to act of C... Lithographed and published by G.J. Rice (St. Paul [Minn).
1872. Smith, John Calvin. Shows mineral localities and railroads. Inset: Silver Islet. 39 x 69 centimeters Scale approximately 1:1,600,000 General Map Collection. J. Disturnell (Philadelphia).