South Wall Triptych, 1976
Equivalent Grey-Green, 1989
Blue-Grey I, 1988
Blue Scale III, 1979
Blue Scale IV, 1979
Black to White 12, 1974 - 80
Parabola II, 1978
Grey - green I, 1989
Elusive Eureka 13, 1977
Green One II, 1975
Diagonal I, 1979
Elusive Eureka 5, 1977
Red to Green, 1975