The "Encyclopedia" was the fruit of a continuing processing of documents gathered from many of the thousands of the international organizations profiled in the "Yearbook of International Organizations". Many such bodies regularly produce a wide range of material on the areas of their concern, many regularly send documents to the UIA, and many, when requested more specifically, supplied documents for the "Encyclopedia". The following organizations provided documents in the greatest quantity: FAO, ILO, UNICEF, UNESCO, UNCTD, WHO, Commonwealth Secretariat, Council of Europe, OECD, World Bank group. Furthermore, the United Nations Library in Geneva facilitated access to other material over two decades. The Institute of Cultural Affairs International was contractually associated at one point to the edition and other aspects of the "Encyclopedia" project. The "Goals, Processes and Indicators of Development" project (led by Johan Galtung) of the United Nations University, in which Anthony Judge participated on behalf of the UIA between 1978 and 1982, was an experience of learning and research that had a significant impact on the editorial content of the "Encyclopedia". Another noticeable influence came from futures studies, with which Judge has long been associated. He reports in "Encyclopedia Illusions" how the narrow focus of the Club of Rome on a few socio-economic aspects of futures research prompted the much vaster exploration concerning world problems and human potential.