Lecture-20 || National Disaster Management Authority || рд░рд╛рд╖реНрдЯреНрд░реАрдп рдЖрдкрджрд╛ рдкреНрд░рдмрдВрдзрди рдкреНрд░рд╛рдзрд┐рдХрд░рдг Disaster Management (mains) By Ajeet Sir