monografie # EJA SIEPMAN VAN DEN BERG # ca. 1990, nm+
Original silkscreen, signed # EJA SIEPMAN VAN DEN BERG, figure I # ed. 5, 1999, mint
Original silkscreen, signed # EJA SIEPMAN VAN DEN BERG, figure III # ed. 5, 1999, mint
Original silkscreen, signed # EJA SIEPMAN VAN DEN BERG, figure IV # ed. 5, 1999, mint