The Ensemble Choral Society Testimonial to the Martyrs of Communist Tyranny Entered from the booking ledger and New York Times concert listing and review. "WEEK'S MUSIC PROGRAMS." New York Times (1923-), Jun 14 1959, p. 1. ProQuest. Web. 7 Mar. 2022. "Ensemble Choral Unit Sings." New York Times (1923-), Jun 15 1959, p. 30. ProQuest. Web. 7 Mar. 2022. 1959-06-14T20:30:00