Color Code I, #2, ed 2
carborundum aquatint
plate 6 x 6 in


Color Code I, #1, ed 2
carborundum aquatint
plate 6 x 6 in


Color Code 1, #3, ed 2
carborundum aquatint
6 x 6 in


Color Code II, #2
carborundum aquatint
6 x 6 in