The Secretariats or homepages of the various regional economic or trade communities are:
OECD Data offers extracts and some complete tables from many publications of the Organization for Economic Co-operation and Development. For Rutgers users, there is OECD iLibrary, with online access to practically all of their publications and data. (Rutgers-restricted Access)
History of Europe (History World)
History of Latin America (History World)
Internet East Asian Sourcebook (Fordham University)
Middle East since 1914 (Fordham University)
Southeast Asia in World History (Craig A. Lockard - selected sections on Google Books)
The Story of Africa (BBC)