(1975)
linocut
(1947)
line-engraving
(c.1948)
(1986)
etching
drawing
(1952)
(1977)
(1953)
lithograph
(1974)
electric hand engraver
((1955))
((1953))
colour monotype
(1983)
softground etching
(1980)
woodcut
(1987)
drypoint
(1925)