Maria Schacko, Soprano Entered from New York Times concert listing and review, and from a copy of the concert program held by the State Office for Citizen Affairs and Public Order, Berlin, Germany. "PROGRAMS OF THE WEEK: METROPOLITAN OPERA CONCERTS AND RECITALS FREE CONCERTS BY WPA." New York Times (1923-), Dec 01 1940, p. 1. ProQuest. Web. 17 Aug. 2022. "Mario Shacko in Recital." New York Times (1923-), Dec 05 1940, p. 32. ProQuest. Web. 17 Aug. 2022. Recital Program, "Maria Shako, Carnegie Chamber Music Hall, Wednesday, December 4, 1940, 8.30 pm", Foliation-E13, in: file of compensation, Registry Number-Berlin 221 596, Office for Compensation/Entschädigungsbehörde, State Office for Citizen Affairs and Public Order/Landesamt für Bürger- und Ordnungsangelegenheiten, Berlin, Germany. solo recital 1940-12-04T20:30:00