Groundwater Level Fluctuations’, ‘Fresh Water’, ‘Groundwater as a Geologic Agent’, ‘Eco-hydrology: Plants and water in terrestrial and aquatic environments’, ‘Groundwater and the environment: experience of Dutch research for central Russia’
3 januari 1999 Kees Maas, Michael van der Valk en Flip Witte Editie 1999 - 3