General Secretariat: correspondence with the members of the Bureau (1971): Rensselaer W. Lee, Ronald Syme, Silvio Zavala, Hans R. Hahnloser, Ali Akbar Siassi, Jean d'Ormesson, Jaroslav Prusek, Ferdinand N'Sougou Agblemagnon, Ignacio Bernal; correspondence "political issues"
Year-end report (1982): report on the budget, correspondence with member organisations on the use of subsidies paid by ICPHS and their use for publications and the organisation of meetings
Year-end report (1983): financial report 1981-1983, report on the budget, correspondence with member organisations on the use of subsidies paid by ICPHS and their use for publications and the organisation of meetings
Year-end report (1990): correspondence with member organisations on the use of ICPHS grants and their use for publications and the organisation of meetings
Correspondence (1984) on ICPHS activities and UNESCO meetings and projects. Files on the symposium Significance and Scope of Diderot and d'Alembert's Encyclopédie and the philosophy of the Enlightenment (23-26 October 1984, Paris)
Correspondence and working documents of the ICPHS concerning the sexennial reports of the UNESCO Executive Board on NGOs (1964-1969; 1970-1975; 1976-1982; 1983-1988; 1988-1993)