(3GdbQO GdeGFI GdhbGjI ef GdMQH GdfhhjI (B/ s - (3cjR(B, (3cjfs; (3YHOGdSdGe HTjQ GdOhjHis ([S.N] : (3GdOGQ GdLeGgjQjI ddfTQ hGdJhRjY hGdGYdGf , s, 1990)
Keywords: (3GdMQhH GdfhhjIs