David Soyer, Cello, and Harriet Wingreen, Piano Entered from booking ledger and New York Times concert listing and review. "CONCERT AND, OPERA PROGRAMS OF THE WEEK." New York Times (1923-), Mar 27 1960, p. 1. ProQuest. Web. 1 Aug. 2022. "SOYER GIVES RECITAL WITH MISS WINGREEN." New York Times (1923-), Mar 29 1960, p. 47. ProQuest. Web. 2 Aug. 2022. duo recital 1960-03-28T20:30:00