TY - BOOK AU - Väisänen,Ulpu TI - Groundwater and factors affecting its quality: examples from the Rovaniemi district of Northern Finland and western Nicaragua ; 19 tables T2 - Bulletin / Geological Survey of Finland / Geologian Tutkimuskeskus: Bulletin SN - 9516908748 PY - 2004/// CY - Espoo PB - Geological Survey of Finland N1 - Zugl.: Diss ER -