. . . . . . . . "Entered from booking ledger and New York Times concert listing and review.\r\n\"CONCERT AND OPERA PROGRAMS FOR THE WEEK.\" New York Times (1923-Current file), Apr 28 1957, p. 1. ProQuest. Web. 28 July 2021.\r\n\"Margarita De Ferran Sings.\" New York Times (1923-Current file), May 03 1957, p. 20. ProQuest. Web. 3 Aug. 2021." . "solo recital" . . . . . . . . "Margarita de Ferran, Soprano" . . . . . . "1957-05-02T20:30:00"^^ .