Entered from booking ledger, New York Times concert listing, and review. "CONCERT AND OPERA PROGRAMS OF THE WEEK." New York Times (1923-Current file), Oct 13, 1957, pp. 128. ProQuest. "GARY TOWLEN PLAYS HIS SECOND RECITAL." New York Times (1923-Current file), Oct 14, 1957, pp. 32. ProQuest.