- document
- van der Bles, G. (author), Gales, A. (author), Kuijper, M. (author), van der Wagt, J.C. (author) other 2000
- document
- van der Bles, G. (author), Dirkse, C. (author) other 2000
- document
- van der Bles, A.A. (author) other 1986
- document
- van der Bles, A.A. (author) other 1986
- document
- van der Bles, G. (author) other 1984