(3dG jecffG OaY GdeUQjf Gdi GdNda(B: s (3ePcQGJ MQH GcJhH (B/s - (3GHQGgje YRJs ((3GdbGgQI (B:s (3QhR GdjhSa ,s, 1974)
Keywords: (3eUQs; (3GdfRGY GdYQHi GdGSQGFjdis; (3GdYedjGJ GdMQHjIs; (3GdGYdGe GdGSQGFjdis; (3MQH GcJhHQ (B1973s