(3GdeQLY GdGSGSi ai GdMGSHGJ hGdfXe GdTNUjI(B, (3L(B2 / s - (3jMji ahRi GHQGgjes ([S.N] : (3eQcR GHMGK THcI GdceHjhJQ GdTNUi , s, 1990)
Keywords: (3GdMGSHGJ GdGdcJQhfjIs; (3fXe GdeYdheGJs; (3HQGeL GdMGSHGJ GdGdcJQhfjIs