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	Objeto volando (Flying Object), 1971 Copper plate etching, engraving, aquatint, and drypoint on paper, sheet 27 1/2 x 18 5/8 inches (69.9 x 47.3 centimeters), copper plate17 3/4 x 12 5/8 inches (45.1 x 32.1 centimeters)