9η Πανελλήνια Μαθητική Προσομοίωση επιτροπών του ΟΗΕ για τα δικαιώματα του ανθρώπου – «Μαθητές σε ρόλο Διπλωμάτη» Στα Εκπ. Απόστολος Παύλος και Βελλίδειο Συνεδριακό Κέντρο

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