Paris, 12 February 1938
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Institutional correspondence
Archived in
- Musée National Picasso-Paris, Fonds Picasso 5
- Museum of Modern Art Archives, New York 5
- Stedelijk Museum Library, Amsterdam 3
- Biblioteca y Centro de Documentación, Museo Nacional Centro de Arte Reina Sofía 2
- Roland Penrose Archive, Scottish National Gallery of Modern Art Archives, Edinburgh 1
- The New York Times 1