(3GdYGOGJ hGdJbGdjO GdeUQjI (B: s (3ef GdGeKGd GdTYHjI ai YgO eMeO Ydi (B/ s - (3GHQGgje GMeO TYdGfs; (3HhQcgGQJ, Lhf dhjSs ((3GdbGgQI (B: s (3GdgjFI GdeUQjI GdYGeI ddcJGH , s, 1989)
Keywords: (3GdahdcdhQs; (3GdGeKGd GdYGejI GdYQHjIs; (3GdGOH GdTYHis; (3GdbUU GdTYHjIs; (3GdahdcdhQ GdeUQis; (3GdGeKGd GdTYHjIs