. . . . . . . . . . . . "1956-12-01T15:00:00"^^ . "solo recital" . . . "NEW YORK PREMIERE of Chopin's MAZURKA IN B-FLAT MAJOR, OP.POSTH.\r\nNEW YORK PREMIERE of Chopin's WALTZ IN A-FLAT MAJOR, OP.POSTH\r\nNEW YORK PREMIERE of Chopin's WALTZ IN E-FLAT MAJOR, OP.POSTH.\r\nNEW YORK PREMIERE of Chopin's VARIATIONS IN A MAJOR, \"SOUVENIR DE PAGANINI\"" . "Maryla Jonas, Piano" . .