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Untitled drawing B, 1956
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Black and Gray 7, 1960
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Black and Gray 12, 1960
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Untitled [Black], green, 1961
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Untitled (Black), yellow-green, 1962
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Rome Six, 1963
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Second Voice, 1965
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Crayon #2, 1965
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Crayon #3, 1965
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Crayon #4, 1965
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Crayon #5, 1965
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Crayon #7, 1965
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NY2, 1968
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#113, 1968
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#112, 1968
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#99, 1968
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NY1 , 1968
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NY8, 1968
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NY4, 1968
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#109, 1968
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#100, 1968
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NY5, 1969
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Drawing #2, 1969
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Drawing (charcoal) #9, 1969
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NY 21, 1969
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NY11, 1969
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NY14, 1969
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NY23, 1969
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NY43a, 1969
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NY53, 1969
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Drawing (charcoal) #1, 1970
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Drawing (charcoal) #5, 1970
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Drawing (charcoal) #3, 1970
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Drawing (charcoal) #7, 1970
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Trace #26, 1977
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Untitled (Late Seventies Drawing #14), 1978
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Arches Paintings I #6, 1980
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Arches Paintings I #12, 1980
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Arches Paintings II #20, 1981
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Arches Paintings II #11, 1981