(3GdfMh GdYQHi (B: s (3OQGSI fUjI (B/s - (3UGHQ HcQ GHhGdSYhOs ((3GdbGgQI(B] : s (3OGQ GdKbGaI ddfTQ hGdJhRjY , s, 1987)
Keywords: (3GdfMhs; (3GddZI GdYQHjIs