Entered from booking ledger and New York Times concert listing and review. The correct program order is uncertain. This ensemble appeared on other events at Carnegie Hall as the Riverside Chamber Singers. "Who Makes Music and Where: METROPOLITAN OPERA." New York Times (1923-), Dec 11 1966, p. 172. ProQuest. Web. 19 Sep. 2024. "RIVERSIDE SINGERS GIVE A FINE RECITAL." New York Times (1923-), Dec 15 1966, p. 61. ProQuest. Web. 20 Sep. 2024.