(3eaJGM GdLfI aj GdGMJLGL HGdSfI (B/s - (3GdSjhWj, LdGd GdOjf s 849-911 (3gLQjs ((3GdeOjfI GdefhQI (B:s (3GdLGeYI GdESdGejI HGdeOjfI GdefhQI (B- (3eQcR TFhf GdOYhI ,s, 1988)
Keywords: (3MLjI GdSfIs; (3OaGY Yf GdSfI s