Letters and official bulletins for the Fourth Session of the International Congress of Anthropological and Ethnological Sciences held in Vienna from 1-8 September 1952. These are:

• International Congress of Anthropological and Ethnological Sciences, Fourth Session, Vienna, Second Circular. Printed leaflet concerning the Congress and cost for membership and for hotel rooms. Dated January 1952.
• Congrès des Sciences Anthropologiques et Ethnologiques: Membership Form. Printed form for application for membership for the Congress.
• Letter from Wilhelm Koppers, Secretary, and Robert Heine-Geldern, Vice-President, International Congress of Anthropological and Ethnological Sciences, to The President, Royal Asiatic Society, to ask the Society to nominate a delegate for the Congress. Dated 21 February 1952.
• Letter from Robert Heine-Geldern to Sir Richard Winstedt to send an official invitation for the Congress. He also writes about his pleasure in having met Sir Richard. Dated 21 February 1952.
• Letter from Secretary to Gentlemen of the Royal Asiatic Society to state that the Organising Committee of the 4th International Congress of Anthropological and Ethnological Sciences has asked the Society for delegates at the Congress. He names H.G. Quaritch Wales and J.V. Mills as delegates who are already appointed. Dated 2 July 1952.