(1989)
screenprint
(1973)
(1967 (dated))
(2000)
etching and aquatint
(1796, 1 September)
mezzotint
((1980))
photocopy
(1984)
(c.2006)
lithograph
(1963)
etched zinc plate
(1966)
colour etching and aquatint
(1955-56)
etching
(1976)
(1964)
offset-lithograph