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	Homenaje a Copérnico (Homage to Copernicus), 1973 Six-color photo-silkscreen and silkscreen on paper (six passes of three screens: cicada photo-screen in two shades of black, moth photo-screen in yellow and black, acetate drawing screen in blue and red), edition 1/30, sheet 32 x 23 3/16 inches (81.3 x 58.9 centimeters), images 29 1/2 x 22 7/8 inches (74.9 x 58.1 centimeters)