(3GdJTQjY GdVQjHi GdeUQi (B/s - (3YGWa UObi s; (3eMeO CMeO GdQRGRs ([(3ecGf GdfTQ ZjQ eMOO(B] :s [(3GdfGTQ ZjQ eMOO(B] ,s, 1989)
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdeGdjI GdYGeI h GdJTQjY GdVQjHi s; (3GdJTQjY GdVQjHi s -- (3eUQ s