(3GdCZGfj GdTYHjI GddHfGfjI (B: s (3OQGSI h HYV feGPLgG GdMdhI (B/ s - (3jYbhH, Eejd HOjYs ((3WQGHdS (B( (3dHfGf (B) :s (3LQhS HQS,s, 1987)
Keywords: (3GdCZGfj GdTYHjIs; (3dHfGfs