. "multiple performances" . . . "Songs of Robert Fairfax Birch" . "Entered from booking ledger and New York Times concert listing and review.\r\n\"CONCERT AND OPERA PROGRAMS OF THE WEEK.\" New York Times (1923-), Apr 10 1960, p. 1. ProQuest. Web. 3 Aug. 2022.\r\nBriggs, John. \"4 VOCALISTS HEARD IN A SONG PROGRAM.\" New York Times (1923-), Apr 11 1960, p. 43. ProQuest. Web. 3 Aug. 2022." . . . . "1960-04-10T20:30:00"^^ . . . . . . "joint recital" .