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X (ENG 7), 1971
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Untitled (ENC 12), 1972
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Grid Series I (ENC 6), 1980
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Grid Series II (ENC 7), 1980
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Grid Series III (ENC 4), 1980
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Grid Series IV (ENC 3), 1980
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Grid Series V (ENC 5), 1980
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Untitled (ENG 28), 1990
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Untitled Charcoal Painting (ENC 40), 1994
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Untitled Charcoal Painting (ENC 41), 1994
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Untitled (ENC 42), 1994
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White Painting XXX (ENW 21), 1996
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Untitled, Moire Painting (ENM 3), c1966
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Untitled (ENC 16), c1974
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Untitled (ENC 57), c1979
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Untitled Charcoal Painting (ENC 30), c1979
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Untitled Charcoal Painting (ENC 31), c1979
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Untitled Charcoal Painting (ENC 9), c1979
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Untitled Charcoal Painting (ENWCP 48), c1993
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Untitled Charcoal Painting (ENWCP 54), c1993
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Untitled Charcoal Painting (ENWCP 56), c1993