David Alfaro Siqueiros. (Mexican, 1896-1974). Echo of a Scream. 1937. Enamel on wood. 48 x 36" (121.9 x 91.4 cm). Gift of Edward M. M. Warburg. © 2011 Siqueiros David Alfaro / Artists Rights Society (ARS), New York / SOMAAP, Mexico.

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