(1936)
linocut
(1962)
woodcut
(1948)
line-engraving
(2000)
etching
(1965)
lithograph
(c.1954)
photo-lithograph
((1930s))
(1920-40)
(c.1958)
colour trandparency
(1968)
(1992, July)
(1990)
(1988)
screenprint
(1953)
(2001)
(1972)
(1992)
offset-lithograph