Installation view of Dieter Roth’s “Keller-Duo” (1980–1989) built with Bjoern Roth (© Dieter Roth Estate Courtesy Hauser & Wirth
Review of Dieter Roth and Music at the Hamburger Bahnhof Museum (Berlin)
at Hyperallergic
http://hyperallergic.com/224592/dieter-roths-chaotic-and-cacophonous-ges...