(3GdehShYI GdJGQjNjI dOhd GdYGde h bGOJgG (B/ s - (3GdUaOj, SajGfs ((3YeGf (B:s (3OGQ CSGeI ddfTQ h GdJhRjY,s, 2000)
Keywords: (3GdehShYGJs; (3GdJGQjNs; (3GdYGdes; (3GdbGOIs