(3GdJNda h GdJfejI (B/s - (3eMeO Ndjd HQYi s; (3Ydi MGaX efUhQs ((3GdbGgQI (B:s (3OGQ GdKbGaI GdYQHjI (B,s, 1990)
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdeGdjI GdYGeI h GdJTQjY GdVQjHi s; (3GdJfejI GdGbJUGOjI s