(3GdHQL aj GdYeGQI GdESdGejI GdMjhjI (B/ s - (3HjL, HjQJhfs; (3NhQTjO, EHQGgjes ((3HjQhJ (B:s (3OGQ GdcJGH GddHfGfj,s, 1981)
Keywords: (3JNWjW GdeOfs; (3GdCHQGLs