Union of International Associations. Yearbook of International Organizations 1981 (19.). Union of International Associations.
Chicago-čujuhus (17. p.)Union of International Associations. Yearbook of International Organizations 1981. 19. Bruselas: Union of International Associations.
MLA-čujuhus (9. p.)Union of International Associations. Yearbook of International Organizations 1981. 19. Union of International Associations.
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