HORST Keller and Evelyn WEISS. Kunst der sechziger Jahre / Art of the Sixties.

(Cologne): Wallraf-Richartz Museum, 1971. The fifth revised edition.  Unpaginated.   The definitive edition of this landmark catalogue designed by Wolf Vostell.  The volume presents the highlights from the private collection of chocolate magnate Peter Ludwig one of the first collectors to recognise the merit of American Pop Art.  Includes contributions from Warhol, Lichtenstein,  David Hockney, Robert Indiana, Jasper Johns, Allen Jones, Donald Judd, and many others. A superb production on various papers including butcher paper, onionskin and graph paper, a very good copy in bolted plexi-glass covers.  Title label free from bolt.