Entered from booking ledger and New York Times concert listing and review. "CONCERT AND OPERA PROGRAMS OF THE WEEK." New York Times (1923-Current file), Apr 12 1959, p. 1. ProQuest. Web. 3 Aug. 2020. Salzman, Eric. "WILLIAM RYAN GIVES DEBUT SONG RECITAL." New York Times (1923-Current file), Apr 14 1959, p. 41. ProQuest. Web. 3 Aug. 2020.