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William Blake, fragment relief-etched copper plate, cancelled plate 'a' of America a Prophecy 1793, 82 x 58 mm. National Gallery of Art, Washington, DC. - New York Arts
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File:William Blake - Songs of Innocence, Plate 8, "The Lamb" (Bentley 8) - Google Art Project.jpg - Wikimedia Commons
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An Inquiry into William Blake's Method of Color Printing | Robert N. Essick, Joseph Viscomi | Blake/An Illustrated Quarterly | Volume 35, Issue 3
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