. . . "New York Debut\r\nEntered from booking ledger and New York Times concert listing and review.\r\nNEW YORK PREMIERE of Léon Orthel's 2 PRELUDES FOR PIANO, OP. 27\r\nNEW YORK PREMIERE of Orthel's SONATINE FOR PIANO\r\n\"CONCERT AND OPERA PROGRAMS OF THE WEEK.\" New York Times (1923-), Mar 06 1960, p. 1. ProQuest. Web. 15 June 2022.\r\n\"Maria Besobrasow in Debut.\" New York Times (1923-), Mar 12 1960, p. 15. ProQuest. Web. 21 July 2022." . . . . "Maria Besobrasow, Piano" . "1960-03-11T20:30:00"^^ . . . . "solo recital" . .