- document
- van den Bosch, J.J. (author) report 1962
- document
- van den Bosch, J.J. (author) report 1961
- document
- van den Bosch, J.J. (author) report 1960
- document
- van den Bosch, J.J. (author) report 1960
- document
- van den Bosch, J.J. (author) report 1960
- document
- van den Bosch, J.J. (author) report 1959
- document
- van den Bosch, J.J. (author) report 1958