(3GdfXQjI GdfbOjI (B:s (3ef NdGd GdJMdjd GdGbJUGOj Gdcdj (B/s - (3eUWaj QTOjs ((3GdGScfOQjI (B:s (3eDSSI GdKbGaI GdLGeYjI,s, 1982)
Keywords: (3GdeGdjI GdYGeI hGdJTQjY GdVQjHjs