(3GdTYQ ai WdGd GdefGPQI hGdZSGSfI (B/ s - (3YeQ TQa GdOjfs ([S.N] : (3GdgjFI GdeUQjI GdYGeI ddcJGH , s, 1987)
Keywords: (3GdTYQ GdYQHis; (3GdYUQ GdLGgdis; (3OhGhjf hbUGFOs; (3GdefGPQIs; (3GdZSGSfIs