(1998, July)
linocut
(1986)
screenprint
(1971)
(1979)
(1970)
(1980)
(1981)
photo-etching
(1937)
wood-engraving
(1993)
computer generated
(c.2006)
digital-print
etching and aquatint
(1969)
aquatint and etching
(2005)
lithograph printed in colour
photographic digital print
(1984)
lithograph
(1982)