(3eHGOF GdEMUGA (B: (3HQfGeL GdebQQGJ GdJCSjSjI h GdYdhe GdJWHjbjI (B/ s - (3LGeYI GdbOS GdeaJhMIs ((3YeGf (B:s (3LGeYI GdbOS GdeaJhMI,s, 1990)
Keywords: (3GdEMUGAs; (3GdEMUGA GdQjGVjs