(3YfOeG CUHMJ eUQ YQHjI (B: s (3OQGSI aj GdeLJeY GdeUQj aj GdYUQ GdaGWej (B/ s - (3YeGQI, eMeOs ((3OeTb (B:s (3OGQ bJjHI ddWHGYI h GdfTQ h GdJhRjY,s, 1989)
Keywords: (3JGQjN eUQs