Joanna De Keyser, Cello New York Debut Entered from booking ledger and New York Times concert listing and review. "Who Makes Music and Where." New York Times (1923-), 02 Jan. 1972, p. 1. ProQuest. Web. 14 Oct. 2025. Ericson, Raymond. "JOANNA DE KEYSER, CELLIST, BOWS HERE." New York Times (1923-), 07 Jan. 1972, p. 27. ProQuest. Web. 14 Oct. 2025. solo recital 1972-01-05T20:00:00