(3GdJHjGf aj EYQGH GdbQBf (B/ s - (3GdYcHQj, eMH GdOjf CHh GdHbGA YHO Gddg GdMSjfs; (3GdHLGhj, Ydj eMeOs ((3HjQhJ (B:s (3OGQ GdLjd,s, 1987)
Keywords: (3GdbQBf GdcQjes; (3EYQGH GdbQBfs