Entered from booking ledger and New York Times concert listing and review.
"CONCERT AND OPERA PROGRAMS FOR THE WEEK." New York Times (1923-Current file), Feb 10 1957, p. 126. ProQuest. Web. 11 May 2021.
"Owen Berger, Pianist, Heard." New York Times (1923-Current file), Feb 11 1957, p. 33. ProQuest. Web. 11 May 2021.