Mexico City, 26 September 1968 - Institutional correspondence Óscar Urrutia's telegram to Carol K. Uht
Madrid, 29 May and 10 June 1981 - Institutional correspondence A letter from Felipe Cons Gorostola to Álvaro Martínez Novillo, and reply
<em>St. Louis Post-Dispatch</em>, Saint-Louis, November 13, 1969, front page and inside pages - Article “Lieutenant Accused of Murdering 109 Civilians”