(3SQ GdegfI GdeUQajI aj GdJTQjY GdCQOfj (B: s (3OQGSI ebGQfI (B/ s - (3GdYWjQ, YHO GdbGOQs ((3YeGf (B:s (3ecJHI OGQ GdKbGaI ddfTQ h GdJhRjY,s, 1996)
Keywords: (3bGfhf GdHfhcs; (3GdHfhcs