- Bulgarian Unit1
- Cardenal, Ernesto1
- Catholic Church1
- Cherniak, E. B.1
- Choldin, Marianna Tax1
- Christian, Shirley1
- Cocks, Geoffrey1
- Cohen, Francis1
- Conquest, Robert1
- Constitutional and Legal Policy Institute at OSI-Budapest1
- Coover, Virginia1
- Corson, William R.1
- Cywiński, Bohdan1
- Czechoslovak Unit1
- Da Graça, John V.1
- Dallin, Alexander1
- Daniels, Robert Vincent1
- David Rohde1
- Davidenko, G.1
- Demszky, Gábor1