de Paviljoens, Land art # ROBERT MORRIS, Observatorium # 1998, mint
Judd, LeWitt, Morris ao # KUNSTENAAR EN FABRIEK # 1970, vg-
Kunstcentrum Flevoland # ROBERT MORRIS, Observatory # 1998 folder, nm+
Morris/ Trasov archive # HAND OF THE SPIRIT # 1992, nm
Museumjournaal, Morris, Beuys, Warhol # JURRIAAN SCHROFER # 1968, mint-
Shire publications # WILLIAM MORRIS # 1977, vg++