Stedelijk Museum Schiedam # KARSPEN EN EDUARD KARSEN # 1977, nm
Visible Language # Visible LAnguage # Autumn 1985, 1985, nm+
Visible Language # VISIBLE LANGUAGE , Linguyistic features # 1971, nm
Visible Language# Calligraphy / CARTOGRAPHY # 1971, nm
Visible Language # Visible Lnguage, summer 1972 # 1972, mint-
Visible language # Concrete poem and typography # Spring 1972, nm+
Visible Language # GENERAL ISSUE , Spring 1988# 1988, nm+
Visible Language # VISIBLE LANGUAGE , Ikon of the Soul # Summer 1976, # 1976, nm+
Visible Lnguage Reading Before Speaking, Summer 1975 # 1975, nm+
Visible Language # A MINIFESTO, Winter 1976 # 1976, nm+
Visible Language # LETTER NAMES , winter 1975 # 1975, nm
Nest # PHILIP AKKERMAN & JAMESZOO # Telephone, 2022, mint
Museum Ulm # PROTEST!, GESTALTEN # folder + invitation, 2022, mint
Dordrechts Museum # HANS PETRI # 2001, nm
CBK Rotterdam # ANNEKE AUER # 1989, nm
CBK Rotterdam # ANNEKE AUER # invitation, 1989, mint-
Fischer Kunsthandel # HERVE BOHNERT # invitation, 2017, mint-
Sien van Meurs # OBJECTEN # 1989, nm
Wilhelm Lehmbruck Museum # WERNER KREUZHAGE # 1976, nm+
Linda & Guy Pieters # DAVID SPILLER # 2009, mint-
