- document
- Boelhouwer, P.J. (author), Boumeester, H.J.F.M. (author), Elsinga, M.G. (author) book 1995
- document
- Boelhouwer, P.J. (author) book 1992
- document
- Conijn, J.B.S. (author), Van Deudekom, P.F.H. (author), Ooms, I.L. (author) book 1987
- document
- Van der Schaar, J. (author) book 1986