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 ...
1881. Morris, C. J. A.; Parkinson, J. B.; Farquhar, Francis Ulric; Allen, Charles Julius, 1840-1915; United States. Army. Corps of Engineers. Includes index sheet. Relief shown pictorially.