Correspondence (1975) with CISS, African Society of Culture, World Federation of Twinned Cities, Union of International Associations, CIM, International Catholic Centre for UNESCO, International Peace Bureau, Standing Committee of NGOs
Correspondence (1980) with ISCU, ICOM, CIM, Union of International Associations, Universala Esperanto Asocio, CISS, International Federation for Home Economics, World Federation of United Nations Associations, World Federation of the Deaf, World Federation of Scientific Workers, Standing Committee of NGOs
Correspondence (1981) with NGO Committee on Ageing, ICSU, Confederation of International Scientific and Technological Organizations for Development, CISS, CIM, NGO Standing Committee, Universala Esperanto Asocio, International Committee for Fair Play, European science foundation, CICT, World Association for the School as an Instrument of Peace, League of Red Cross Societies, World Federation of Twinned Cities-United Cities, French National Assembly
Correspondence (1982) with CISS, Confederation of International Scientific and Technological Organizations for Development, ICSU, Council on Archives, Standing Committee of NGOs
Correspondence (1990) with European Centre for Educational Alliances, International Council on Archives, ARSA, International Association of Universities, COEFA, CISS, AIAP, International Peace Research Association, North East NGOs, CIM, ICOM, NGO Standing Committee (meetings and reports on the 22nd NGO Conference, 11-15 June 1990), ICSU, UOIF
Colloquium on the concept of law (Paris, 27-31 July 1953): correspondence with UNESCO, final report, minutes, preparatory texts of the participants (Djordjevic, Matsudaira, I.I. Morris, Q. Martin, Mirkine-Guetzevitch, McKeon, Mahmassani, Geiger; Schneider)
Correspondence with the Federation of Documentation (Index bibliographicus) (1955-1956). Correspondence with international bibliographic companies, especially those published under the auspices of ICPHS (1957-1958)