- document
- Frijters, D.D.J. (author) master thesis 2003
- document
- Frijters, D.D.J. (author) master thesis 2003
- document
- Frijters, D (author) master thesis 2003
- document
- Frijters, C.A. (author) master thesis 1986
- document
- Frijters, C.A. (author) master thesis 1978