Paris, 18 October 1948 - Institutional correspondence A letter from Mariano Miguel to José Ballester-Gozalvo
<em>Los Angeles Free Press</em>, Los Angeles, vol. 3 (9), no. 85 (March 4, 1966): front page and inside pages (4–5) - Article “Building A Tower For Peace”
Mougins, 10 December 1970 - Personal correspondence A telegram Mariano Miguel, Picasso’s secretary, sent to Raimon Noguera to request the cancellation of the opening ceremony for the expansion of Museo Picasso