‘Water in the Netherlands’, ‘Palaeohydrology and Environmental Change’, ‘Tracing Technique in Geohydrology’, ‘Elements of Physical Hydrology’, ‘Ecohydrological basis for coastal zone management’, ‘Een gat in mijn emmer’
2 januari 1999 Co de Vries, Michael R. van der Valk en Flip Witte Editie 1999 - 2
