New York Debut WORLD PREMIERE of André Singer's 6 PIECES FOR PIANO, OP. 42 Entered from booking ledger and New York Times concert listing and review. "CONCERT AND OPERA PROGRAMS OF THE WEEK." New York Times (1923-Current file), Oct 05 1958, p. 1. ProQuest. Web. 29 May 2020. Briggs, John. "PIANO DEBUT MADE BY JEAN WILLIAMS." New York Times (1923-Current file), Oct 08 1958, p. 42. ProQuest. Web. 29 May 2020.