Exhibition catalogue published in conjunction with shows held at the Nationalgalerie, Berlin, April 30 - June 15, 1975 and the Neue Galerie - Sammlung Ludwig, Aachen, July 12 - September 14, 1975. Texts by Wieland Schmied. Includes an interview with Lichtenstein by John Coplans, exhibition checklist, biography and bibliography. Text in German.