http://www.haberarts.com/cage.htm John Cage and the Postwar Guggenheim Reviews by John Haber of 'The Tradition of the New: Postwar Masterpieces' and of 'Rolywholyover a Circus' at New York's Guggenheim Museum. http://www.english.upenn.edu/~afilreis/88/cage-exhibit-95.html John Cage's "Rolywholyover" in Philadelphia, 1995 An informal discussion. http://www.soum.co.jp/mito/94/cage/index.html Review of John Cage's Rolywholyover A Circus Review of John Cage's Rolywholyover A Circus, presented Nov 3, 1994 through Feb. 26, 1995. http://hypertextbook.com/eworld/rolywholyover.shtml Rolywholyover: A Composition for Museum by John Cage (E-World) Paper by Glenn Elert