Contributors 1 - 33

• United States. Corps of Topographical Engineers [4]
• Sneden, Robert Knox [4]
• Magnus, Charles [2]
• Bruff, Joseph Goldsborough [2]
• United States. War Dept. Corps of Topographical Engineers [1]
• Verlag Von A.D. Geisler [1]
• Hopkins, Griffith Morgan [1]
• Nicholson, W. L. [1]
• United States. Army. Corps of Topographical Engineers [1]
• Bohn, Casimir [1]
• Schedler, J. [1]
• Hoffmann, J. Paul [1]