(1991)
screenprint
(1961)
lithograph
(1981)
mezzotint
(1974)
aquatint printed in black ink
(1962)
linocut
(1987)
(1992)
(c.1963)
(1960-80)
etching
(1988)
(1986)
colour xerography
(1971)
hard ground
(1973)
(1964)