(3GdJUha GdESdGej Hjf GdCUGdI h GdEbJHGS aj YUQ GdfGHdSj (B/ s - (3YWG, YHO GdbGOQ CMeOs ((3HjQhJ (B:s (3OGQ GdLjd,s, 1987)
Keywords: (3GdESdGes; (3JUhas