New York Debut Entered from booking ledger and New York Times concert listing and review. "OPERA AND CONCERT PROGRAMS." New York Times (1923-), May 03 1964, p. 1. ProQuest. Web. 20 Nov. 2023. "Cynthia Hope, Soprano." New York Times (1923-), May 04 1964, p. 34. ProQuest. Web. 20 Nov. 2023.