(3GdCeI h GdOhdI aj SjGSI GdfHj Udi Gddg Ydjg h Sde h GdQGTOjf (B/ s - (3GdMOjKj, fRGQ YHO GddWjas ((3HZOGO (B:s, 1987)
Keywords: (3GdCMcGe GdSdWGfjIs; (3fXGe GdMce aj GdESdGes