Cordes, Dr. Frederick C. (1955, 2 letters) Corly, J.H. (1933, 10 letters) Corsetti, George (1957, 1 letter) Cortorelli, Lucas A. (1957, 1 letter) Cotton, Albert F. (1952, 1 letter) Coulson, N.S. (1955, 3 letters) Cowden, James E. (1957, 1 letter) Creek Farm Nursery (1953, 1 letter) Crook, T.H. (1951, 1 letter) Crowell, Carlen A. (1956, 1 letter) Cruz, Mrs. Joseph P. (1951, 2 letters) Cuatrecasas, Dr. Jose (1946–1957, 105 letters)