. . . . . "Some details have been added from the New York Times concert listing and review.\r\nNEW YORK PREMIERE of Heinrich Lemacher's SONATA FOR TWO PIANOS, OP. 118\r\nNEW YORK PREMIERE of Talivaldis Kenins' CONCERTINO FOR TWO PIANOS\r\n\"CONCERT AND OPERA PROGRAMS OF THE WEEK.\" New York Times (1923-Current file), Apr 12 1959, p. 1. ProQuest. Web. 3 Aug. 2020.\r\nSchonberg, Harold C. \"GUTBERGS SISTERS GIVE PIANO RECITAL.\" New York Times (1923-Current file), Apr 18 1959, p. 19. ProQuest. Web. 3 Aug. 2020." . "1959-04-17T20:30:00"^^ . "Ingrida and Karina Gutbergs, Duo Pianists" . . . . "duo recital" . .