- document
- Silvis, L.G. (author), Diermanse, F. (author), Penning, W.E. (author), Bakkum, R.C.J. (author), Gehrels, J.C. (author), Swierstra, W. (author) report 2003
- document
- Hooijer, A. (author), Bakkum, R.C.J. (author) report 2002
- document
- Bakkum, R.C.J. (author), Groot, S. (author) report 1998
- document
- Bakkum, L.T.M. (author) master thesis 1978
- document
- Bakkum, L.T.M. (author) other 1978
- document
- Bakkum, L.T.M. (author) other 1978
- document
- Bakkum, L.T.M. (author) other 1978
- document
- Bakkum, L.T.M. (author) other 1978
- document
- Bakkum, L.T.M. (author) other 1978