- Groundwater residence time and paleohydrology in the Baltic Artesian basin:isotope geochemical dataVaikmäe, Rein; Gerber, C.; Purtschert, Roland; Aeschbach-Hertig, Werner; Raidla, ValleAGU Fall Meeting 2016 : San Francisco, California, 12-16 December 20162016 / p. H43E-1491