Entered from booking ledger and New York Times concert listing and review. "Who Makes Music and Where," New York Times (1923-), 19 Jan. 1969, p. 1. ProQuest. Web. 1 May 2025. Hughes, Allen. "FLUTIST PRESENTS VARIED PROGRAM: WILLOUGHBY PLAYS BACH TO PRECEDE MODERN WORK." New York Times (1923-), 24 Jan. 1969, p. 75. ProQuest. Web. 1 May 2025.