(3GdLjT h GdbJGd aj UOQ GdESdGe (B: s (3OQGSI Yf GdebGJdI aj YgO GdQShd Udi Gddg Ydjg h Sde (B/ s - (3YhGO, eMehO CMeO eMeO SdjeGfs ((3YeGf (B:s (3ecJHI GdefGQ,s, 1987)
Keywords: (3YUQ GdQShd Udi Gddg Ydjg h Sdes; (3GdNdaGA GdQGTOhfs; (3GdLgGOs; (3GdJGQjNs