- document
- Kuenen, J.G. (author), Boonstra, J. (author), Schroeder, H.G.J. (author), Veldkamp, H. (author) journal article 1977
- document
- Kuenen, J.G. (author), Veldkamp, H. (author) journal article 1973
- document
- Kuenen, J.G. (author), Veldkamp, H. (author) journal article 1972
- document
- Kuenen, J.G. (author), Veldkamp, H. (author) journal article 1971
- document
- Kuenen, J.G. (author), Veldkamp, H. (author) journal article 1970