Duo Classique Entered from booking ledger and New York Times concert listing and review. "Who Makes Music and Where." New York Times (1923-), Oct 01 1972, p. 1. ProQuest. Web. 17 Mar. 2024. Davis, Peter G. "Schwarz and Zambona show Unity in Recital." New York Times (1923-), Oct 09 1972, p. 37. ProQuest. Web. 17 Mar. 2024. duo recital 1972-10-07T20:00:00