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You searched for: Author Derby, George M. Remove constraint Author: Derby, George M. Subject Nautical charts Remove constraint Subject: Nautical charts Institution Minnesota Remove constraint Institution: Minnesota
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1. Chart of Lake Minnetonka, Minnesota

1906. Dunaway, Horace, Derby, George M., U.S. Lake Survey, and United States. Army. Corps of Engineers. Scale 1:20,000. "Reproduced in colors in 1906 by ..." Relief shown by contours and soundings. "Soundings, in feet, are reduced to the plane of the ...