Richard Parke, Tenor, and Jay Hilborn, Baritone New York Debut Entered from booking ledger and New York Times concert listing and review. "WEEK'S MUSIC." New York Times (1923-), Jan 19 1964, p. 1. ProQuest. Web. 1 Nov. 2023. "Tenor and Baritone Program." New York Times (1923-), Jan 20 1964, p. 21. ProQuest. Web. 1 Nov. 2023. 1964-01-19T17:30:00