Flushing, New York, 23 May 1939 - Institutional correspondence Simon Guggenheim's and Dana C. Backus's form letter to ask for donations
Madrid, 1 September 1977 - Institutional correspondence A letter from Jesús Madalena to José Mario Armero
Paris, 31 May 1937 - Internal institutional documents Summary of figures submitted as payment for propaganda
Paris, 31 May 1937 - Internal institutional documents Figures submitted by the Special Acquisitions Service for Propaganda