Briefe von Schönberg an C
| Empfänger | Firma |
| C.C. Birchard and Company | |
| C.F. Peters | |
| C.G. Röder | |
| Cal State Bd of Ed | |
| California Dept of Ed | |
| Capitol Records | |
| CARE | |
| Carnegie Inst of Tech | |
| Caro & Jellinek | |
| Casino | |
| CBS | |
| Centralbank Deutscher Sparkassen | |
| Chemical Bank and Trust Company | |
| Chicago Daily News | |
| Chicago SO | |
| Chickering and Sons | |
| Circle Blue Print Corporation, Inc | |
| Columbia | |
| Columbia Storage and Warehouse Company | |
| Columbia, Ltd[?] | |
| Composers-Authors Guild | |
| Concertgebouw | |
| Coordinating Comm for German Refugees | |
| Courier Musical et Theâtrale, Le | |
| Curtis Publishing Company | |
| Czechoslovakia, Consul | |
| Czechoslovakia, Légation | |
| Campbell, John Scott | |
| Candé, Roland de | Annuaire International |
| Canic, Josip | |
| Carlson, Alfred | |
| Carpenter, John Alden | Arts Club of Chicago |
| Carpenter, Patricia | |
| Carter, John | British Info Services |
| Cartmill, Gordon | |
| Caruso, Francesco | |
| Casals, Pablo | Institut Musical Casals |
| Casals, Pablo | Orquestra Casals |
| Casella, Alfredo | |
| Castellini, Giovanni | |
| Castle, Mabel Wing | |
| Cent, Frowde[?] | |
| Cesurey[?], André | Revue Musicale, La |
| Chailley, Jacques | |
| Chávez, Carlos | |
| Chisholm, Erik | Active Society |
| Chochem, Corinne | |
| Clark, Edward | BBC |
| Clark, Thernon | USC |
| Clement, Evelyn | Cal State Bd of Ed |
| Cleve, Fanny | |
| Clifton, Chalmers | Music Press, Inc |
| Cobb, Scribner | National City Bank |
| Cohen, Elliot E. | Commentary |
| Cohen, Moses S. | |
| Cohen, Mrs. Frank | Mailamm |
| Cohen, P. | Students' Orch "Sweelinck" |
| Cohn, Arthur | Free Lib Philadelph |
| Colbert, Henry | New Friends of Music |
| Colgan, Charles J. | Cal Fran Tax Com |
| Collins, Alan C. | Curtis Brown, Ltd |
| Compinsky, Alec | ALCO Recording Co |
| Cook, Elizabeth G. | American Express |
| Cooke, James Francis | Etude |
| Coolidge, Elizabeth Sprague | |
| Coon, Leland A. | |
| Coop, Squire | |
| Copland, Aaron | |
| Copley, Richard | |
| Corbière, Henri | |
| Corley, J.H. | UC Berkeley |
| Cornell, Mrs. W.G. | |
| Corrolazis, [?] | |
| Cort van der Linden, Rudolph | |
| Costa, Raffael da | Deutsche Allg Zeitung |
| Couch, W.T. | Univ of Chicago |
| Coulter, Eliot B. | U.S. Dep of State |
| Cowell, Henry | New Music Edition |
| Cowell, Olive Thompson | |
| Craft, Robert | |
| Craig, Minsa | |
| Crain, Hal D. | Los Angeles Conservatory |
| Cress, Anne M. | UCLA |
| Cronheim, Paul | Concertgebouw |
| Crüger, Käthe | |
| Culp, Julia | |
| Curjel, Hans | Staatsoper |
| Curtis, Louis Woodson | Los Angeles |
| Cykler, Edmund | |
| Czernin, Ferdinand | Austrian Action |
