. "New York Debut\r\nEntered from booking ledger and New York Times concert listing and review.\r\n\"WEEK'S OPERA AND CONCERTS.\" New York Times (1923-), Mar 15 1964, p. 1. ProQuest. Web. 10 Nov. 2023.\r\n\"Miss Markay in Debut.\" New York Times (1923-), Mar 16 1964, p. 37. ProQuest. Web. 10 Nov. 2023." . . . . . . . . . . . . "1964-03-15T17:30:00"^^ . . . . "solo recital" . "Barbara Markay, Soprano" .