Fred Sandback,  Untitled (Four–part Vertical Construction in Two Colors), 1987  , January–March, 2010  
       
     
Fred Sandback,  Untitled (Four–part Vertical Construction in Two Colors), 1987  , January–March, 2010  
       
     
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Fred Sandback, Untitled (Four–part Vertical Construction in Two Colors), 1987 , January–March, 2010