- Ruimtelijk onderzoek in beeld: Financieringsstromen van ruimtelijk relevant onderzoek in 1990 en vergelijking met 1985
- Looking back to the future: Proceedings of the tenth bienal conference of the International Association for the Study of People and their Physical Surroundings, Delft, the Netherlands, July 5-8, 1988. Vol. II: Symposia and Papers
- Looking back to the future: Proceedings of the tenth bienal conference of the International Association for the Study of People and their Physical Surroundings, Delft, the Netherlands, July 5-8, 1988. Vol. I: Program and Abstracts