(3eMGSHI GdfaS (B/ s - (3EHf CHj GdOfjG, CHh HcQ YHO Gddg Hf eMeOs; (3EHQGgje, eLOj GdSjOs ((3GdbGgQI (B:s (3ecJHI GdbQGf,s, 1987)
Keywords: (3GdESdGes; (3GdMOjK GdTQjas; (3GdhYX h GdEQTGOs