- Corbett & Skidmore (Chicago)1
- Corps of Engineers1
- Corps of Engineers (Washington, D.C.?)1
- Corps of Engineers (Washington, D.C.?)1
- Corps of Topographical Engineers; Washington, D.C.?1
- County Board of Commissioners (St. Louis County, Minnesota)1
- Cowperthwait, Desilver & Butler; Philadelphia1
- Crane Island Association (Hennepin County, Minn)1
- Crossley Co (Portland, Or), 19081
- Cruchley Map Sellers (London)1
- Českého Zemského svazu pro Povznešení Návštĕvy Cizinců v Čechách (Praha)1
- D. Appleton & Co (New York)1
- D. Appleton & Co. (New York), 18491
- D. Appleton & co. (New York)1
- D. Appleton and Company (Philadelphia)1
- D. Chillas, Lith. (Philadelphia)1
- D. McClelland (Washington, D.C.)1
- D.A. Pettibone (Ann Arbor)1
- D.D. Merrill (St. Paul)1
- D.D. Merrill, Randall & Co (St. Paul, Minn)1