- Author: H. C. Hemker (auth.) Dr. H. R. Lijnen Dr. D. Collen Dr. M. Verstraete (eds.)
- Language: English
- Year: 1980
- Author: H. C. Hemker (auth.) C. Th. Smit Sibinga P. C. Das J. J. van Loghem (eds.)
- Language: English
- Year: 1982
- Author: H. C. Hemker (auth.)
- Language: English
- Year: 1983