(3GdNjGd YfO EHf YQHj (B: s (3GdfXQjI h GdeLGdGJ (B/ s - (3GdYWGQ, SdjeGfs ((3GdbGgQI (B:s (3OGQ GdKbGaI ddfTQ,s, 1991)
Keywords: (3GdadSaI GdESdGejIs; (3GdJUha GdESdGejs