The collection consists of administrative documents, correspondence, UN testimony, printed materials produced by the International Oil Working Group, various conference files, UN documents relating to South Africa and sanctions, and assorted reference materials, including shipping and tanker information as well as relevant news clippings. Materials reflect the loosely-constructed character of the organization, in which the work itself was more important than the structure. Documents span the years 1957-1987, but the bulk of material is from 1980-1985. Please note that in many cases dates are not inclusive.

This collection is organized into seven series:

• Series 1. Administrative, 1979-1986
• Series 2. Correspondence, 1979-1986
• Series 3. Writings & Publications, 1960-1986
• Series 4. Conference Materials, 1976-1986
• Series 5. UN Documents, 1960-1987
• Series 6. Shipping/Tanker Reference Materials, 1957-1986
• Series 7. Reference Materials, 1974-1987