(3GdhLg GdBNQ ddEJMGO h GdJQbj (B/ s - (3cdTj, MSfs; (3GdCQDhfGW, eMeOs ((3GQHO (B:s (3bOSjI ddfTQ h GdJhRjY,s, 1990)
Keywords: (3JGQjN GdYQHs; (3GdEeHQGWhQjI GdYKeGfjI (B1402-1922s; (3GdLeYjGJ GdSQjIs