Untitled (Chalk Inverse), 1969

Dispersed chalk

Dimensions variable

Cleaved Corners (3), 1969
Six meat cleavers (chromium-molybdenum steel and nylon)
Dimensions variable

A- (Red, Green, Blue, Purple, Felt, Steel, Bought, Cut, Folded, Placed, Rolled), 1966
Felt and steel
84 x 84 inches

Study, 1973
Graphite and ink on green paper
36 x 48 inches

Including; Excluding #II Centerpoints: partially separated; partially exchaged (according to area), 1975
Ink on green paper
42 x 180 inches