(1970). Selected training courses specially designed for developing countries =: Liste de cours selectionnes concus specialement a l'intention des pays en voie de developpement (7th ed.). Geneva: Economic Commission for Europe.
Παραπομπή Chicago StyleSelected Training Courses Specially Designed for Developing Countries =: Liste De Cours Selectionnes Concus Specialement a L'intention Des Pays En Voie De Developpement. 7th ed. Geneva: Economic Commission for Europe, 1970.
Παραπομπή MLASelected Training Courses Specially Designed for Developing Countries =: Liste De Cours Selectionnes Concus Specialement a L'intention Des Pays En Voie De Developpement. 7th ed. Geneva: Economic Commission for Europe, 1970.
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