ROTH, DIETER AND RICHARD HAMILTON Two works, comprising Collaborations of Ch. Rotham. By Richard Hamilton and/or Dieter Roth. Stuttgart: editions Hansjorg Mayer with Galeria Cadaques, 1977. 4to, original printed wraps. Inscribed by Roth on the half-title with a small drawing. [Together with:] Interfaces. Basel: Roths' Verlag, 1989. 2 vols. 12mo, slipcase.