(3eZGeQGJ GdcJQhfjg (B/ s - (3SYO gGOi SdjeGfs; (3OhfcGf , Jhes; (3ahRjI fGLis ((3GdYQGb (B: s (3OGQ GdMQjI ddWHGYI , s, 1989)
Keywords: (3GdMGSHGJ GdGdcJQhfjIs; (3GdGLgRI GdGdcJQhfjIs