- document
- Wereldsma, R. (author) report 1975
- document
- Wereldsma, R. (author) report 1975
- document
- Nibbering, J.J.W. (author) report 1975
- document
- Nibbering, J.J.W. (author), Scholte, H.G. (author) report 1974
- document
- Nibbering, J.J.W. (author) report 1974
- document
- Scholte, H.G. (author) report 1973
- document
- Nibbering, J.J.W. (author) report 1973
- document
- Nibbering, J.J.W. (author) report 1973
- document
- Wereldsma, R. (author) report 1973
- document
- Nibbering, J.J.W. (author) report 1973
- document
- van Katwijk, P.A. (author) report 1973
- document
- Nibbering, J.J.W. (author) report 1973
- document
- Nibbering, J.J.W. (author) report 1973
- document
- Scholte, H.G. (author), Vink, J.H. (author) report 1972
- document
- Nibbering, J.J.W. (author) report 1972
- document
- Nibbering, J.J.W. (author), Vonk, R. (author) report 1972
- document
- Nibbering, J.J.W. (author) report 1972
- document
- Scholte, H.G. (author), Vink, J.H. (author) report 1972
- document
- Nibbering, J.J.W. (author) report 1971
- document
- Nibbering, J.J.W. (author) report 1971