- document
- Mulder, A. (author), Kroes, J.H. (author), IJmkers, F. (author) book 1987
- document
- Laddé, E.E. (author), Dubbeld, G. (author), Van Ham, K. (author), Mulder, A.F. (author), Pluijmers, B.J. (author), Post, J.M. (author), Scheers, P.M.C. (author) book 1985