Entered from booking ledger and New York Times concert listing and review. "CONCERT AND OPERA PROGRAMS OF THE WEEK." New York Times (1923-Current file), Nov 09 1958, p. 1. ProQuest. Web. 4 June 2020. "ANITA HALGEN SINGS: SOPRANO OFFERS PROGRAM AT CARNEGIE RECITAL HALL." New York Times (1923-Current file), Nov 10 1958, p. 36. ProQuest. Web. 4 June 2020.