Entered from booking ledger and New York Times concert listing and review. "CONCERT AND OPERA PROGRAMS FOR THE WEEK: OPERA METROPOLITAN." New York Times (1923-Current file), Jan 22 1956, p. 100. ProQuest. Web. 30 Nov. 2020. "Malle Magi-Schwarz Sings." New York Times (1923-Current file), Jan 23 1956, p. 20. ProQuest. Web. 30 Nov. 2020.