English English English roentgens of radiation nivel radiactivo de 175 roentgen English English English English English roentgen Roentgen English English English English http://en.wikipedia.org/wiki/Roentgen_(unit) English English English roentgens of radiation English roentgens of radiation röntgens English Roentgens English Roentgen (RAWNT-jun) Roentgens roentgens of radiation roentgens ($\mathrm{R}$) roentgens of radiation English English English English English roentgens of radiation English English English English English English roentgens of radiation http://en.wikipedia.org/wiki/Roentgen_%28unit%29 English English Roentgens English English English English en