(3bWQGJ GdeOGO(B: (3W (B1 / s - (3eMeO QLH GdHjheis ([S.N] : (3GdfGOi GdGOHi GdKbGai , s, 1992)
Keywords: (3GdGOH GdYQHis; (3ebGdGJ heMGVQGJs