Paris, 18 October 1948 - Institutional correspondence A letter from Mariano Miguel to José Ballester-Gozalvo
<em>Parabólica Magazine</em>, Seville, special number, November 2004 - Magazine “A propósito de la BIACS: políticas culturales” (“About BIACS: Cultural Policies”)
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