Publisher
- C. Hoym, Nachf : L. Cahnbley1
- C. Schrack and Company1
- C. Weichsel Co.1
- Caplen, John A.1
- Carleton1
- Cartel Records1
- Catherall, T.1
- Central Y.M.C.A. College1
- Chapman and Hall1
- Charles Claesen & Cie.1
- City Art Studio1
- Clarks and Courts Printing1
- Coates, William P.1
- Colourpicture Publishers1
- Come-Packt Furniture Company1
- Commission for Foreign Relations of the Central Council of Trade Unions of the U.S.S.R.1
- Common Cause1
- Communist International1
- Communist League of America (Opposition)1
- Cotter, J. E.1