(1966)
etching and aquatint
(1969)
(1968)
(1973)
(1967)
colour etching and aquatint
(1971)
softground-etching and aquatint
(c.1942)
photo-lithograph
(1962)
screenprint
(1937)
etching
(1984)
(1840-49)
engraving
(1856)
wood-engraving
(1979-1983)
photo-etching and drypoint
(1979-83)
(1957)
lithograph