(3Hjf GdbUQjf (B((3HGdYHQjI(B) / s - (3fLjH eMahXs ([S.N] : (3GdLGeYI GdGeQjcjI HGdbGgQI , s, 1988)
Keywords: (3GdGOH GdYQHis; (3GdbUI GdYQHjIs; (3fLjH eMahXs