New York, 30 August 1979 - Institutional correspondence A letter from Ethen Shein to Richard E. Oldenburg
Buenos Aires, 28 November 1979 - Institutional correspondence Rafael Fernández Quintanilla's letter to José Joaquín Puig de la Bellacasa
Buenos Aires, 17 September 1979 - Institutional correspondence Rafael Fernández Quintanilla's letter to Javier Tusell, dated 17 September 1979