(3GdESJYLGd ai GdeQGaYGJ GdeOfjI GdOhdjI ef bGfhf GdeQGaYGJ Edi GdbGfhf GdOhdi GdNGU (B:s (3eMGhdI dfXQjI YGeI (B/s - (3CMeO YHO GdcQje SdGeIs ((3GdbGgQI (B: s (3OGQ GdfgVI GdYQHjI,s, 1988)
.412-459 (3HHdjhLQGajG(B: (3UaMGJ(B.s
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdbGfhf GdELJeGYjs -- (3bGfhf Ohdjs