(3GdGUhdjI GdjghOjI ai GSQGFjd ef GLd GdGQV hGdQH (B/ s - (3GjGf dhSJcs; (3MSfi RjfIs ([S.N] : (3eDSSI GdOQGSGJ GdadSWjfjI , s, 1991)
Keywords: (3JGQjNs; (3GdjghOjIs; (3GSQGFjds; (3GdhVY GdOhdis