(3bQGAGJ ef gfGhgfGc (B/ s - (3gOi MHjTIs ([S.N] : (3GdgjFI GdeUQjI GdYGeI ddcJGH , s, 1988)
Keywords: (3GdGOH GdYQHis; (3GdYUQ GdMOjKs; (3GdeLehYGJs