. "Toni and Rosi Grunschlag" . . . . . . "Part of the third season of \"Twilight Concerts\", a series of recitals that took place in the Main Hall at 5:30 PM on Sundays. The first half hour of each concert was broadcast on WQXR.\r\nU.S. PREMIERE of Anton Heiller's TOCCATA\r\n" . "duo recital" . "1950-12-10T17:30:00"^^ . . "radio broadcast" . . . .