- document
- Doorduin, P.J. (author) master thesis 1996
- document
- Doorduin, P.J. (author) report 1995
- document
- Doorduin, P.J. (author) report 1995
- document
- Doorduin, P.J. (author) report 1994
- document
- Doorduin, P.J. (author) report 1994
- document
- Doorduin, P.J. (author) report 1994
- document
- Doorduin, P.J. (author) report 1994
- document
- Doorduin, P.J. (author) report 1994
- document
- Doorduin, P.J. (author) report 1994