. . . "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\nSalzman, Eric. \"RUTH LORIN, COOPER HEARD WITH GUTOFF.\" New York Times (1923-), Apr 16 1960, p. 11. ProQuest. Web. 4 Aug. 2022." . . . . "Ruth Lorin, Mezzo-Soprano, and John Craig Cooper, Composer-Pianist, with Daniel Gutoff, Piano" . . . . . "chamber music performance" . . . . . . . "joint recital" . . . . . . . . . "1960-04-15T20:30:00"^^ .