Vol. 1B: Int-Z. - VII, 1600 p. - ISBN 3-598-24529-7
Vol. 2: Geographic volume, international organisation participation : country directory of secretariats and memberships. - XII, 1764 p. - ISBN 3-598-24530-0
Vol. 3: Subject volume global action network : classified directory and index. - XIV, 1810 p. - ISBN 3-598-24531-9
Vol. 4: Bibliographic volume international organization bibliography and resources. - X, 637 p. - ISBN 3-598-24532-7