. . "solo recital" . . . . . . "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\"Concert: Peter Raikov Presents Song Program.\" New York Times (1923-Current file), Apr 29 1957, p. 20. ProQuest. Web. 28 July 2021." . . . . . . "Peter Raikov, Bass-Baritone" . "1957-04-28T17:30:00"^^ .