Gallery Exhibitions Institutional Exhibitions Bernd & Hilla Becher Kies Sand Basalt Venloer Straße 21, Cologne, 11 January – 9 February 1991 Installation Views List Index Bernd & Hilla Becher Kies Sand Basalt Venloer Straße 21, Cologne, 11 January – 9 February 1991 Installation view, 1991 Installation view, 1991 Installation view, 1991 Installation view, 1991 Installation view, 1991 Installation view, 1991