. "1964-02-23T17:30:00"^^ . "Mabel Brotherton, Soprano" . "solo recital" . . . . . "Entered from booking ledger and New York Times concert listing and review.\r\n\"WEEK'S CONCERT AND OPERA PROGRAMS.\" New York Times (1923-), Feb 23 1964, p. 1. ProQuest. Web. 6 Nov. 2023.\r\n\"Soprano Makes Debut.\" New York Times (1923-), Feb 24 1964, p. 20. ProQuest. Web. 6 Nov. 2023." . . .