(3GdHfGA GdSjGSi ai GdQja GdeUQi(B: (3JMdjd dLeGYGJ GdUahI GdbOjeI hGdLOjOI (B/ s - (3GMeO RGjOs ([S.N] : (3OGQ GdeYGQa , s, 1981)
Keywords: (3GdYUQ GdMOjKs; (3eUQs; (3JGQjNs; (3GdGMhGd GdGLJeGYjIs; (3KhQI (B23 (3jhdjh (B1952s; (3GdWHbGJ GdGLJeGYjIs; (3GdQja GdeUQis; (3GdMjGI GdQjajIs; (3UahI GdeLJeYs