Sales catalogues Walther König, Hansjörg Mayer, Centro Di

(1) Walther König, Katalog 4 Moderne Kunst, Autumn 1970 and Katalog 6, Happening & Fluxus, published in conjunction with the exhibition at the Kölner Kunstverein, November 1970.

(2) Edition Hansjörg Mayer: Verlagsverzeichnis 1971 (blue cover) and Verlagsverzeichnis 1972 (green cover). (3) Centro Di Firenze, September 1972. Yellow Art Catalogue Bulletin with a stamp of a bookstore in The Hague on the cover. Plus a red catalogue from the Centro Di International Documentation Center, undated, listing art catalogues from 1968 and 1969. (total 6)