5 October 1941
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Newspapers
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- The New York Times 2
- Museum of Modern Art Archives, New York 6
- Musée National Picasso-Paris, Fonds Picasso 4
- Biblioteca y Centro de Documentación, Museo Nacional Centro de Arte Reina Sofía 2
- Getty Images 1
- Special Collections, Fine Arts Library, Harvard College Library 1
- University of North Texas, Digital Library 1