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