- document
- Konter, J.L.M. (author) report 1976
- document
- Adihardjo, R. (author) report 1970
- document
- report 1972
- document
- Jorritsma, J. (author) report 1975
- document
- Adihardjo, R. (author) report 1972
- document
- Akkerman, G.J. (author) report 1976
- document
- Jong, R.J. de (author) report 1981
- document
- Wijngaarden, N.J. van (author) report 1981
- document
- Schukking, W.H.P. (author) report 1973