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Inscription

lower left in graphite by unknown hand: #18 MIX C. / BLK + CONC. / BLUE / YELLOW / RED / BLK CONC. [circular arrow]; lower right in graphite: OK SL[circled] / #18/2; lower right verso in graphite by unknown hand: LeWitt: Color & Black, 30 x 17 #2 OKTP

Provenance

Kathan Brown, San Francisco; gift to NGA, 2011