title: Long-term monitoring of soil gas radon and permeability at two reference sites.
mesh_terms: D005740:Gases / Q000032:analysis*; D010539:Permeability; D011829:Radiation Dosage; D011834:Radiation Monitoring / Q000379:methods* / Q000706:statistics & numerical data; D011886:Radon / Q000032:analysis*; D012016:Reference Values; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012990:Soil Pollutants, Radioactive / Q000032:analysis*; D013997:Time Factors
chemical_list: D005740:Gases; D012990:Soil Pollutants, Radioactive; D011886:Radon