The analysis of the results of the repeated gravity measurements carried out on the profile of Põltsamaa-Lelle and groundwater as one of the disturbing factorsVilipuu, Marek; Oja, Tõnis; Sildvee, Heldur; Paesalu, JoelXII Geofysiikan päivat 2005, Helsingissä 19.-20.05.20052005 / p. 253-258