(3eYLRGJ GdQShd (B((3U(B) (3h OdGFd UOb fHhJg (B/ s - (3Ldghe, EHQGgjes; (3MeGO, YHO GdSdGes ((3GdbGgQI (B:s (3GdOGQ GdeUQjg GddHfGfjg,s, 1993)
Keywords: (3GdSjQI GdfHhjIs; (3GdfHhIs