(3GdZfjej GdhLjR aj GdJfXje GdOhdj GdfXQjI GdYGeI (B/ s - (3eMeO WdYJ GdZfjejs ((3GdGScfOQjI (B: s (3efTGI eYGQa , s, 1977)
Keywords: (3GdbGfhf GdOhdj GdYGes