found: Das Gelsenkirchener Musiktheater u. die blauen Reliefs ... c1995:t.p. (Gelsenkirchener Musiktheater) p. 13 (designed by Deilmann, von Hausen, Rave u. Ruhnau; opened Dec. 15, 1959)
found: Szene, Bilder, Augenblicke, 2001:t.p. (Musiktheater im Revier)
found: Musik-Almanach, 1986/87:p. 368 (Gelsenkirchen: Musiktheater im Revier)
found: Schillerthater NRW, WWW Web site, Mar. 28, 2003(The Schillertheater NRW was composed out of the Wuppertaler Bühnen and the Musiktheater im Revier. It existed from 1996 to 2001, after which the original theaters were reinstated.)