Entered from booking ledger, the New York Times concert listing and review. "MUSIC PROGRAMS." New York Times (1923-Current file), Oct 07 1956, p. 132. ProQuest. Web. 1 Apr. 2021. "CONCERT SERIES IS STARTED HERE: SEAMAN'S TWILIGHT PROGRAMS AT CARNEGIE RECITAL HALL TO RANGE IN STYLE, TIME." New York Times (1923-Current file), Oct 14 1956, p. 82. ProQuest. Web. 5 Apr. 2021.