(1948)
line-engraving
(1936)
linocut
((1955))
etching
lithograph
(1959)
linocut and woodcut
(1965)
(c.1954)
photo-lithograph
((1930s))
(1920-40)
(c.1958)
colour trandparency
(1968)
(1992, July)
(1990)
woodcut
(1988)
screenprint
(1953)
(2001)
(1972)
(1992)
offset-lithograph