Yearbook of international organizations.
Union of International Associations.
Brussels : Union of International Associations,
Each volume 1983- carries its own edition statement. Vols. 2 and 3 for 1985/86-   called 3rd ed.-
Vols. for 15th-16/18th editions issued also in French under title: Annuaire des organisations internationales.
Complemented by: International association statutes series, 1988-
International agencies
International agencies
Annuaire des organisations internationales
Annuaire des organisations internationales