INTERFACES 1989 Dieter Roth Richard Hamilton INTERFACES softcover, offset on paper, glue bound Slipcase: chipboard, stapled Each book: 6 11/16 x 4 5/16 in. (17 x 11.1 cm) Slipcase: 7 x 4 7/16 in. (17.7 x 11.3 cm), 128 pp.