Paris, 28 October 1953 - Institutional correspondence Maria Oliva Fraga's letter to Arturo Profili, dated 28 October 1953
Paris, 5 November 1953 - Institutional correspondence Maria Oliva Fraga's letter to Arturo Profili, dated 5 November 1953
New York, 8 May 1968 - Institutional correspondence Antonio Serrano's letter to Fernando María Castiella
San Sebastián, 2016 - Exhibition catalogue Catalogue for the exhibition 1937: On Guernica, War and Civitas at the Museo de Bellas Artes, Bilbao