(1982). Directory of educational documentation and information services: Directory of educational documentation and information services = Repertoire des services de documentation et information sur l'education = Repertorio de servicios de documentacion e informacion educacionales (4. ed.). Paris: United Nations Educational.

Directory of educational documentation and information services: Directory of educational documentation and information services = Repertoire des services de documentation et information sur l'education = Repertorio de servicios de documentacion e informacion educacionales. 4. ed. Paris: United Nations Educational, 1982.

Directory of educational documentation and information services: Directory of educational documentation and information services = Repertoire des services de documentation et information sur l'education = Repertorio de servicios de documentacion e informacion educacionales. 4. ed. Paris: United Nations Educational, 1982.