Entered from booking ledger and New York Times concert listing and review. "MUSIC PROGRAMS FOR THE CURRENT WEEK." New York Times (1923-), Apr 19 1964, p. 1. ProQuest. Web. 14 Nov. 2023. "Kenneth Roberts, Tenor." New York Times (1923-), Apr 27 1964, p. 25. ProQuest. Web. 16 Nov. 2023.