(3JYde GdSHGMI (B/ s - (3ZGOI fOje (B((3eJQLe(B)s; (3cQGjf eGjcs ([S.N] : (3GdOGQ GdOhdjI ddfTQ hGdJhRjY , s, 1991)
Keywords: (3JOQjHs; (3GdGdYGH GdQjGVjIs; (3GdSHGMIs; (3GdZWSs