Castellanos, Dr. Alberto (1948–1957, 10 letters) Castrillon, Enrique Angulo (1953, 1 letter) Catlin, Mrs. Helen (1949, 1 letter) Ceballos B., Ishmael (1956–1957, 4 letters) Ceci, Abel J. (1948, 1 letter) Celarier, Dr. Robert Paul (1950–1952, 6 letters) Chafee, Henry S. (1948–1957, 8 letters) Chamberlain, Ross H. (1956–1960, 30 letters) Champion, Robert L. (1956–1957, 2 letters) Chaney, Ralph W. (1951, 1 letter) Chappell, L.F. (1951, 1 letter)