(3eG jfaY GdeSde HYO haGJg (B/s - (3GHf eMeO, EHQGgjes; (3YHO GdYGd, MSfs ((3WfWG(B- (3eUQ (B:s (3ecJHI GdUMGHI,s, 1987)
Keywords: (3GdehJs; (3GdKhGH hGdYbGHs; (3jhe GdbjGeIs; (3GdhYX hGdEQTGOs