(1952)
etching
(1980)
linocut
(1983)
woodcut
(1987)
(c.1948)
(1977)
(1947)
line-engraving
((1955))
(1953)
lithograph
(1974)
electric hand engraver
((1953))
colour monotype
(1925)
(1960-70)
((1962-63))
drypoint
(1969)
(1944)
(1954-55)