1. Low-level tritium measurements in water;Allen;Nucl. Instrum. Meth.,1966
2. Six years' environmental tritium profiles in the unsaturated and saturated zones, Grønhøj, Denmark;Andersen,1974
3. Seasonal variations of tritium and other constituents in groundwater in the Chalk near Brighton, England;Downing;J. Inst. Water Eng. Sci.,1978
4. The flow mechanism in the Chalk based on radio-isotope analyses of groundwater in the London Basin;Downing;J. Hydrol.,1979
5. On the uptake of tritium by soil water and groundwater;Ehhalt;Water Resour. Res.,1973