(3ai YdejI GdacQ GdNdOhfi (B/ s - (3egOi YGeds ((3HjQhJ (B: s (3OGQ GdaGQGHi , s, 1990)
Keywords: (3GdadSaI GdGSdGejIs; (3GdMQcGJ GdacQjI YfO GdeSdejfs; (3GHf NdOhfs