Zelenka Chamber Orchestra Entered from booking ledger and New York Times concert listing and review. “Who Makes Music and Where.” New York Times [New York, N.Y., United States], 25 Mar. 1973, p. 153. AL. “Zelenka Chamber Ensemble Offers Ingratiating Concert.” New York Times [New York, N.Y., United States], 1 Apr. 1973, p. 77. GN. chamber orchestra performance 1973-03-30T20:00:00