مصادر الصور
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(1-1) © Scottish National Portrait Gallery.
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(2-1) © 2004 TopFoto.co.uk.
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(2-2) © Scottish National Portrait Gallery.
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(4-1) By courtesy of the National Portrait Gallery.
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(5-1) Museum Boÿmans Van Beuningen, Rotterdam.
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(7-1) © 2004 TopFoto.co.uk.
