(3dZI GdchHhd L(B1 / s - (3OGQ GdQGJH GdLGeYjIs ([S.N] : (3OGQ GdQGJH GdLGeYjI , s, 1987)
Keywords: (3GdMGSHGJ GdGdcJQhfjIs; (3GdchHhds