For best experience please turn on javascript and use a modern browser!
You are using a browser that is no longer supported by Microsoft. Please upgrade your browser. The site may not present itself correctly if you continue browsing.

Dr. ir. J.H. (Jan Harm) Koolstra


Visiting address
  • Gustav Mahlerlaan 3004
Postal address
  • Gustav Mahlerlaan 3004
    1081 LA Amsterdam
Contact details