- Busch, Wilhelm, 1832-1908.1
- Buttinger, Joseph.1
- Calhoun, John C. (John Caldwell), 1782-1850.1
- Canadian Institute of International Affairs.1
- Carroll, Ruth, 1899-1999, author.1
- Cassirer, Ernst, 1874-1945, author.1
- Caudill, Rebecca, 1899-1985, author.1
- Chandler1
- Charles R. Hadley Company.1
- Chönz, Selina.1
- Clymer1
- Clymer, Eleanor, 1906-2001.1
- Collodi, Carlo, 1826-1890.1
- Colum, Padraic, 1881-1972.1
- Communist Party of Puerto Rico.1
- Congress of Industrial Organizations (U.S.). Department of Education and Research.1
- Cook1
- Crawford, William H., author. aut1
- Curtis1
- Daugherty, Sonia Medvedeva, 1893-1