(3eYGde OQGSI aj GdUQa (B: s (3GdCbjSI GdaYdjI GdegLhQI (B: (3OQGSI dZhjI JCUjdjI (B/ s - (3YeGjQI, ESeGYjd CMeOs ((3YeGf (B:s (3OGQ Mfjf ddfTQ hGdJhRjY,s, 1993)
Keywords: (3GddZI GdYQHjIs; (3bhGYO GddZIs; (3Yde GdUQas