(3GdJZjQ GdELJeGYj GdEbJUGOj aj eLJeY HOhj (B: s (3OQGSI ejOGfjI defWbI hGOj NGdO aj dHfGf (B/ s - (3GdQGYj, dhQjSs ((3WQGHdS (B:s (3LQhS HQS,s, 1987)
Keywords: (3GdeLJeY GdHOGFjs; (3GdHOhs