Yearbook of international organizations. - Union of International Associations (Brussels : Union of International Associations, 1951)
Latest issue consulted: 1951-
Published in 3 vols. 1983-1996/1997; 4 vols. 1997/1998- ; 5 vols. <2001/2002->
Each volume 1983-<1986> carries its own edition statement. Vols. 2 and 3 for 1985/86- called 3rd ed.-
Keywords: International agencies -- Directories; International Agencies -- Directory