Entered from booking ledger and New York Times concert listing and review. "THE CURRENT WEEK'S MUSIC PROGRAMS." New York Times (1923-), Apr 12 1964, p. 1. ProQuest. Web. 13 Nov. 2023. Klein, Howard. "DILWORTH-LESLIE IN PIANO RECITAL: PRESENTS PROGRAM OF THREE LARGE-SCALE WORKS." New York Times (1923-), Apr 13 1964, p. 33. ProQuest. Web. 13 Nov. 2023.