Creator
- Cass County Board of Supervisors1
- Cass County Road Commission1
- Charlevoix County (Mich.)1
- Cheboygan County (Mich.)1
- Clinton County Road Commission (Mich.)1
- Clyde E. Williams & Associates1
- Committee on Foreign Relations1
- Committee on Indian Affairs1
- Consumers Power Company (Mich.)1
- Coon, George1
- Coronelli, Vincenzo1
- Coyle, Randolph1
- Crawford County Road Commission1
- Cóvens et Mortier1
- Dawson, E. B.1
- Delamarche, Charles François1
- Delta County (Mich.)1
- Delta County Road Commission1
- Department of Conservation1
- Detroit Edison Company1