"chamber music performance" . "The Salzburg String Quartet" . . "All-Beethoven Program\r\nEntered from booking ledger and New York Times concert listing and review.\r\n\"Who Makes Music and Where.\" New York Times (1923-), 26 Apr. 1970, p. 1. ProQuest. Web. 30 July 2025.\r\nHenahan, Donal. \"SALZBURG QUARTET ESSAYS BEETHOVEN.\" New York Times (1923-), 29 Apr. 1970, p. 50. ProQuest. Web. 30 July 2025." . . . . . "1970-04-28T20:30:00"^^ . . .