(1993)
computer generated
(c.2006)
digital-print
(1986)
etching and aquatint
(1969)
aquatint and etching
(2005)
lithograph printed in colour
photographic digital print
(1984)
lithograph
(1982)
(1981)
(1847)
pen-lithograph
(1973)
offset- lithograph
(1990)
screenprint