- document
- de Wit, Cornelis (author) journal article 1979
- document
- de Wit, Cornelis (author) report 1974
- document
- de Wit, G. (author) master thesis 1972
- document
- de Wit, J.G. (author) report
- document
- de Wit, J.G. (author) report
- document
- de Wit, J.G. (author) report
- document
- de Wit, J.G. (author), de Boer, E.J. (author) journal article 1969
- document
- de Wit, J.G. (author) report 1961