Roentgen (R) Roentgens Roentgen Röntgens a dose higher than .5 Roentgen Roentgens reference Roentgens rontgens Roentgen (R) English roentgens Roentgens Roentgen (R) English a dose higher than .5 Roentgen R English Roentgen roentgens English roentgens of radiation µR Roentgen unit roentgens of radiation µR English English Roentgens Roentgen English English English roentgen µR Roentegen Roentgens Roentgens Roentgens https://en.wikipedia.org/wiki/Roentgen_(unit) a dose higher than .5 Roentgen Roentgens roentgen röntgens Roentgens English http://en.wikipedia.org/wiki/Roentgen_(unit) roentgens of radiation roentgens of radiation mr English English Roentgens roentgens of radiation Roentegen roentgen English English http://en.wikipedia.org/wiki/Roentgen_(unit) Roentgen (R) Roentgens roentgens of radiation English English English roentgens of radiation Roentegen English µR roentgens of radiation Roentegen