Kümmel, M Outdoor (222)Rn-concentrations in Germany - part 1 - natural background. [electronic resource] - Journal of environmental radioactivity Jun 2014 - 123-30 p. digital Publication Type: Journal Article; Research Support, Non-U.S. Gov't ISSN: 1879-1700 Standard No.: 10.1016/j.jenvrad.2014.01.012 doi Subjects--Topical Terms: Air Pollutants, Radioactive--analysisBackground RadiationCalibrationEnvironmental MonitoringEquipment DesignGeographyGermanyModels, TheoreticalRadiation DosageRadiation Monitoring--methodsRadon--analysisRadon Daughters--analysis