(3TQM bGfhf GdYbhHGJ GdGQOfj (B:s (3GdbSe GdYGe(B/s - (3eMeO Ydi GdSGde YjGO GdMdHis ((3HZOGO (B:s (3OGQ hcJHI HZOGOi ddfTQ hGdJhRjY (B,s, 1993)
(3GdfU HGddZI GdYQHjIs
Keywords: (3bGfhf LfGFi s; (3bGfhf GdYbhHGJ GdbSe GdYGes