Роберт Никль: Работы

• Untitled, 1961
• Untitled, 1962
• Untitled, 1963
• B5, 1964
• Untitled (black on orange), 1969
• Untitled, 1969
• Untitled, 1973
• Untitled, 1974
• Untitled, 1975
• Untitled (Enclosed), 1978
• Untitled, 1979
• Untitled Collage, 1979
• Untitled, 1979