Entered from booking ledger and New York Times concert listing and review. "Who Makes Music and Where: METROPOLITAN OPERA." New York Times (1923-), 18 Jan. 1970, p. 95. ProQuest. Web. 25 June 2025. Henahan, Donal. "Weilerstein and Halligan Play Ives Sonata with Native Grace." New York Times (1923-), 20 Jan. 1970, p. 46. ProQuest. Web. 25 June 2025.
Donald Weilerstein, Violin, and Susan Halligan, Piano