Entered from booking ledger and New York Times concert listing and review. "PROGRAMS OF THE CURRENT WEEK." New York Times (1923-Current file), May 27 1956, p. 100. ProQuest. Web. 25 Mar. 2021. "Federation Choral in Concert." New York Times (1923-Current file), May 29 1956, p. 30. ProQuest. Web. 26 Mar. 2021.