Quelle: The imperial Hofburg Palace in Vienna hosts the meetings of the 55-nation OSCE Permanent Council. Vienne: Organisation pour la sécurité et la coopération en Europe. Couleur.
Organization for Security and Co-operation in Europe, OSCE. [ON-LINE]. [s.l.]: [s.d.]. Disponible sur http://www.osce.org/index.php.

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