| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Doolhoven en labyrinten in Nederland / druk 1: gids | 978-90-6906-039-2 (90-6906-039-6) | 2007 | F. Schaefers |
| Van Nelle/Monument in progress/druk 1 | 978-90-6906-038-5 (90-6906-038-8) | 2005 | D'L. Camp;M. Dicke |