(3GdbU Hjf GdMbjbI hGdNjGd (B/ s - (3eLOi eMeO TeS GdOjfs ([S.N] : (3GdgjFI GdeUQjI GdYGeI ddcJGH , s, 1990)
Keywords: (3GdGOH GdYQHis; (3GdbUU GdbUjQIs; (3GdbUI GdYQHjIs; (3GdGSGWjQ ai GdGOHs; (3JGQjN hfbOs