- Clason Map Co (Denver), 19071
- Clason Map Co. (Chicago)1
- Clason Map Co. (Denver)1
- Clason Map Co. (Denver, Colo.)1
- Clason Map Co., (Denver, Colo.)1
- Clason Map Co.; Denver, Colorado 19201
- Coast Survey Office1
- Coávens et C. Mortier ; Amsterdam1
- Coávens et Mortier ; Amsterdam1
- Colburn & Co. ; London1
- Colby (New York), 18711
- Colorado State Geological Survey (Boulder, Colo)1
- Colorado State Geological Survey (Boulder, Colorado)1
- Colton & Co (New York)1
- Colton (New York)1
- Commissioner of Lands and Works (Victoria)1
- Commissioner of Public Works (Woonsocket, R.I), 19301
- Compagnie des Chemins de Fer, Paris - Lyon - Méditerranée (Paris)1
- Copp Clark Co. Lith (Toronto)1
- Copyright by Arthur O. Wheeler (Sidney, B.C)1