Geographical extension (1974): Correspondence with the International Association of Semiology on the organisation of its first congress (scheduled for August 1967, Warsaw, did not take place) and the International Association of Semiotics on the organisation of its first congress (2-6 June 1974, Milan)
General Secretariat: correspondence with the officers and organisers of the General Assembly (1959): Charles E. Odegaard, Ronald Syme, Silvio Zavala, Felice Battaglia, Jules Marouzeau, Hans R. Hahnloser, Emilio Garcia Gomez, R.N. Dandekar, Albert H. Marckwardt, Carsten Hoeg
General Secretariat: correspondence with the members of the Bureau: Charles E. Odegaard, Ronald Syme, Silvio Zavala, Felice Battaglia, Hans R. Hahnloser, Tetsuro Yamamoto, Kazimir Kumaniecki, C.C. Berg; general correspondence
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"
General Secretariat: correspondence with the members of the Bureau (1970): Ronald Syme, Silvio Zavala, Hans R. Hahnloser, Jean d'Ormesson, Jaroslav Prusek, Ferdinand N'Sougou Agblemagnon
General Secretariat: correspondence with the members of the Bureau (1969): Ronald Syme, Silvio Zavala, Hans R. Hahnloser, C.C. Berg, Jean d'Ormesson, Jaroslav Prusek, Rensselaer W. Lee, Ali Akbar Siassi
General Secretariat: correspondence with the members of the Bureau (1967): Ronald Syme, Silvio Zavala, Hans R. Hahnloser, Tetsuro Yamamoto, C.C. Berg, Jean d'Ormesson, Jaroslav Prusek, Rensselaer W. Lee, Ali Akbar Siassi
General Secretariat: correspondence with members of the Bureau (1966): Ronald Syme, Silvio Zavala, Hans R. Hahnloser, Tetsuro Yamamoto, C.C. Berg, Jean d'Ormesson, Jaroslav Prusek, Rensselaer W. Lee; general correspondence
General Secretariat: correspondence with members of the Bureau (1965): Charles E. Odegaard, Ronald Syme, Silvio Zavala, Hans R. Hahnloser, Tetsuro Yamamoto, Kazimir Kumaniecki, C.C. Berg, Jean d'Ormesson, Jaroslav Prusek; general correspondence
General Secretariat: correspondence with members of the Bureau (1964): Charles E. Odegaard, Ronald Syme, Silvio Zavala, Hans R. Hahnloser, Tetsuro Yamamoto, Kazimir Kumaniecki, C.C. Berg, Jean d'Ormesson; general correspondence
