New York Debut Entered from booking ledger and New York Times concert listing and review. "CONCERT AND OPERA PROGRAMS OF THE WEEK." New York Times (1923-), Apr 05 1964, p. 1. ProQuest. Web. 13 Nov. 2023. Strongin, Theodore. "Leonora Suppan, Pianist, Makes New York Debut." New York Times (1923-), Apr 07 1964, p. 29. ProQuest. Web. 13 Nov. 2023.