- Century Company1
- Chaffee, O. N. (Engineer)1
- Charlevoix County (Mich.)1
- Cheboygan County (Mich.)1
- Chicago Lithographing Co.1
- Clinton County Road Commission (Mich.)1
- Clyde E. Williams & Associates1
- Consumers Power Company (Mich.)1
- Coon, George1
- Cram, George Franklin, 1841-19281
- Crawford County Road Commission1
- Dawson, E. B1
- Dawson, E. B.1
- Dawson, E. B., engineer1
- Dawson, E. B., engraver1
- De La Vergne, Earl W.1
- Delta County (Mich.)1
- Delta County Road Commission1
- Department of Conservation1
- Desilver, Charles1