1. NCRP, Report No. 97,Measurement of radon and radon daughter in air (1988)
2. David Bodansky,Indoor radon and its hazard (University of Washington Press, Seattle and London, 1987)
3. NCRP, Report No. 78,Evaluation of occupational and environmental exposure to radon and its daughter in USA (1984)
4. NCRP, Report No. 103,Control of radon in houses (1989)
5. NCRP, Report No. 100,Exposure of USA population diagnostic medical radiation (1989)