(3MQhH HdG fgGjI (B:s (3GdJONd GdGejQcj aj HdOGf GdYGde GdKGK (B/s - (3MjOQj, fHjd s ((3OeTb (B:s (3UHQ ddWHGYI h GdfTQ ,s, 1988)
Keywords: (3GdGejQcj s; (3HdOGf s; (3GdJONds; (3GdYGde s