- document
- Wal, M. van der (author) report 1987
- document
- Wal, M. van der (author) report 1985
- document
- Konter, J.L.M. (author) report 1982
- document
- Koeman, J.W. (author) report 1982
- document
- Strating, J. (author) report 1980
- document
- Ramkema, C. (author) report 1976
- document
- Adihardjo, R.S. (author) report 1967