Note that other data files required for problems in the text book can be down-loaded through links found in the "solved problems" sections under individual chapters.
Exponential Model for Tritium Input Function (By Maloszewski, P. and
Zuber, A., 1996. Lumped parameter models for interpretation of environmental
tracer data (Supplementary Annex). In: Manual on mathematical models in
isotope hydrology. IAEA-TECHDOC-910, IAEA, Vienna): Tritium
Exponential Model
For additional detail in textbook, see Input
function for 3H in groundwater