pnguye:Hélio Oiticica, Bilateral Equali, 1959, Oil-casein emulsion on wood fibreboard, Tate. Purchas
pnguye:Hélio Oiticica, Bilateral Equali, 1959, Oil-casein emulsion on wood fibreboard, Tate. Purchased with assistance of the American Fund for the Tate Gallery, Tate Members, and The Art Fund, 2007 -- source link