Twin Tunnels Catalogue raisonné no. 132 Artist's CR 123 April, 1966 New York Acrylic on aluminium and chrome on brass 38 x 29 x8 inches / 97 x 74 x20 cm Exhibitions: Vormen van de kleur/New Shapes of Color, Stedelijk Museum, Amsterdam, 1966–7 chevron_right Literature: Wim Crouwel, Vormen van de kleur/New Shapes of Color, exhibition catalogue, Stedelijk Museum, 1966–7 chevron_right Michael Findlay, 'The Efficiency Game', Art and Artists, vol.1, no.10, January chevron_right
