Stedelijk Museum Amsterdam # KRISTJAN GUDMUNDSSON, Circles # artist book,mint--
Allen Ruppersberg, Sunday Quality , Conceptual art# 24 PIECES # 1970, nm+
Barbara & Michael Leisgen # LA TENTATIVE DE SAUTER PAR DESSUS L'HORIZON# 1975, nm+
van Abbemuseum # RICHARD LONG, Countless Stones # 1983, mint
Donald Karshan, The New York Cultural Centre # CONCEPTUAL ART AND CONCEPTUAL ASPECTS # 1970, nm
Stedelijk Museum # JAN VAN MUNSTER # Wim Crouwel, 1970, nm
Utrechtse Kring, Long, Weiner ao # KONSEPTUELE KUNST # 1972, nm