Don Cossack Russian Male Chorus Entered from New York Times concert listing and review, and an advertisement in the 10/4/1931 program. "Concert Programs of the Week." New York Times 18 Oct. 1931: 115. Print. "Don Cossack Chorus Returns." New York Times 19 Oct. 1931: 31. Print. choir performance 1931-10-18T20:30:00