Bert van Duijn
| Title | Dr. |
| First Name | Bert |
| Last Name | van Duijn |
| Organisation | Fytagoras BV |
| Address |
P.O. Box 546 2300 AM Leiden Netherlands |
| Phone | +31 613089955 |
| Fax | +31 715275085 |
| bert.vanduijn@fytagoras.com |