(3GdhXjaI GdbfUdjI h GdOHdheGSjI aj GdbGfhf h GdeeGQSI (B:s (3OQGSI ebGQfI (B/s - (3LGHQ , YGUe s ((3HjQhJ (B:s (3YhjOGJ ,s, 1986)
Keywords: (3GdOHdheGSjI s; (3GdbGfhf s; (3GdbfUdjI s; (3GdhXjaI s