Γνωστοποίησις Notification by the Democratic Youth Movement "Grigoris Lambrakis" (DKNGL) to the police department on its youth clubs - ΚΓ Αστυνομικό Τμήμα Υμηττού; Ymittos Police Department (23rd); Δ.Κ.Ν.Γ.Λ. Υμηττού; Democratic Youth Movement "Grigoris Lambrakis" (DKNGL)