(3JfHDGJ fhSJQ GOGehS(B/s - (3MeGOI,Lejd,s ((3HZOGO(B[(3GdYQGb(B]:s (3GdOGQ GdhWfjI ddfTQ hGdJhRjY hGdGYdGf,s, 1989)
(3GdfU HGddZI GdYQHjI eJQLe ef GddZI GdGfcdjRjIs
Keywords: (3GdadSaI GdZQHjIs