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- Russell, Charles M. (Charles Marion), 1864-192633
- United States. Army. Corps of Topographical Engineers32
- Making of America Project31
- United States31
- United States. Department of the Interior31
- Higgins, C. A. (Charles A.)30
- Hough, Emerson, 1857-192330
- Jackson, William Henry, 1843-194230
- United States. War Dept. Topographical Bureau30
- Pike, Zebulon Montgomery, 1779-181329
- United States. Army. Corps of Engineers29
- United States. Geological Survey29
- Remington, Frederic, 1861-190928
- Allen, Paul, 1775-182627
- Bowles, Samuel, 1826-187827
- Geographical Surveys West of the 100th Meridian (U.S.)27
- Hafen, Le Roy Reuben, 1893-27
- Wheeler, George M. (George Montague), 1842-190527
- Ruxton, George Frederick Augustus, 1820-184826
- Twain, Mark, 1835-191026