A la pintura: Blue 6-11
1968 · Color brushed aquatint, aquatint, and lift-ground etching and aquatint, with letterpress in black and blue, on white wove paper
Plate: 26.5 × 47 cm (10 7/16 × 18 9/16 in.); Sheet: 63.2 × 98 cm (24 15/16 × 38 5/8 in.)
Art Institute of Chicago