For the 30th Congress the title was changed to the International Congress of Human Sciences in Asia and North Africa. The Congress was held in Mexico City in August 1976. Material concerned with this Congress is:

• Letter from Marion Evans, Superintendent, Congress & Inclusive Tours, Lufthansa, to send the preliminary announcement and poster for the 30th International Congress of Human Sciences in Asia and North Africa. Typed, dated 11 March 1975.
• First Invitation to the Congress giving details of the sections, papers, trips and registration. Printed in Spanish, English and French, undated.
• Poster for the 30th Congress. Printed in Spanish, English and French, undated.
• Letters from Sabena Airlines and CP Air to the Royal Asiatic Society offering assistance in travel arrangements to the Congress. Two letters, typed, dated 20-23 May 1975.
• Letter from Jorge Alberto Lozoya, Secretary General, 30th Congress, to Royal Asiatic Society to ask whether the Society would assist in coordinating travel for groups of scholars to the Congress. Typed, dated 14 November 1975.
• Provisional Registration Form for the Congress. Printed in Spanish, English and French, undated, with accompanying envelope.
• Correspondence between Mrs J. Makowiecka and Mrs Crawford, Secretary, Royal Asiatic Society, concerning the contact details for the 30th Congress. Two letters, handwritten and typed, dated 11-15 December 1975.
• Correspondence between Dr J.G. de Casparis and Mrs Crawford, Secretary, Royal Asiatic Society, concerning Casparis being the Society's official representative at the Congress. Two letters, typed, dated 2-11 July 1976.
• Letter from L. Bazin, Secretary-General, International Union for Oriental and Asian Studies, to send the updated Constitution of the Union after the General Assembly held at the Mexico Congress. Typed in French with printed constitution in English and French, undated.

The Congress name was subsequently altered to the International Congress of North African and Asian Studies. The 34th Congress was held in Hong Kong in August 1993. The material associated with this Congress is:

• Correspondence between Gyorgy Hazai, Secretary-General, International Union for Oriental and Asian Studies, and A.D.H. Bivar, President, Royal Asiatic Society, concerning the Society's representation at the Congress in Hong Kong and points for the Agenda for the meeting of the Union to be held there. Two letters, dated 17 May - 2 June 1993.

The International Union of Orientalists was founded in September 1951 in Istanbul at the International Congress of Orientalists. It was renamed in 1973 as the International Union for Oriental and Asian Studies. This material covers the interaction of the Royal Asiatic Society with the Union in the time period 1951-1977.

Correspondence, drafts and reports concerning the inauguration of the International Union of Orientalists.

Letter from Hamilton Gibb to Mrs Davis, Secretary, Royal Asiatic Society, to send his suggestions for the titles for the Prize Essay Competition and also to send a draft letter to Monsieur Bacot of the Société Asiatique concerning the draft Statutes of the proposed International Union of Orientalists. He asks if the Royal Asiatic Society has received a copy of the draft Statutes. With his letter is that to Monsieur Bacot, also dated 28 July 1951.

Letter from Hamilton Gibb to Mrs Davis, Secretary, Royal Asiatic Society, to suggest that she writes to Professor Bosch-Gimpera of UNESCO to obtain a draft of the Statutes.

Letter from Mrs Davis, Secretary, Royal Asiatic Society, to Professor Bosch-Gimpera, UNESCO, to request a copy of the statutes for the proposed International Union of Orientalists.

Letter from Professor Bosch-Gimpera to Mr(s) Davis, Secretary, Royal Asiatic Society, to send a copy of the draft Statutes. These are with the letter.

Letter from Professor Dr. Zeki Velidi Togan, President of Organising Committee of XXIInd International Congress of Orientalists, to the Royal Asiatic Society to send a draft of the statutes for the International Union of Orientalists and to state that the foundation of the proposed Union will be dealt with a the meeting of the Congress in Istanbul.

Letter from Hamilton Gibb to Mrs Davis, Secretary, Royal Asiatic Society, to state that due to lack of a subvention by UNESCO towards the cost of a General Assembly of the Union, it has been decided to postpone the meeting.