Huisman, M., & Bethlehem, J. G. (1999). Hierarchical Clustering of Large Data Sets: Classification of ZIP Code Areas. Research Paper CBS, 9937.
Keller, W. J., Willebroordse, A. J., Bethlehem, J. G., & Ypman, W. F. H. (1999). Statistical Processing in the Next Millenium. Research Paper CBS, 9917.
Couper, M. P., Baker, R. P., Bethlehem, J. G., Clark, C. Z. F., Martin, J., Nicholls II, W. L., & O'Reilly, J. M. (1998). Computer Assisted Survey Information Collection. (Wiley series in probability and statistics : survey methodology section). Wiley.
Bethlehem, J. G. (1998). Blaise at the University of Amsterdam. International Blaise User Group, 11, 22-23.
Bethlehem, J. G., Kooiman, P., & Nobel, J. (1998). Academic and Official Statistics in The Netherlands: Some Perspectives. Proceedings of the AOSC'98 Conference, Roumania.
Bethlehem, J. G., & Hofman, L. P. M. B. (1998). Imputation with Blaise and Manipula. Proceedings of the 5-th Blaise User Meeting, 47-64.
Bethlehem, J. G., & Manners, T. (1998). TADEQ, A Tool for Analysing and Documenting Electronic Questionnaires. Proceedings of the 5-th Blaise User Meeting, 91-98.
Keller, W. J., & Bethlehem, J. G. (1998). The Impact of EDI on Data Processing. Proceedings of the NTTS, Sorrento, 85-92.
Bethlehem, J. G., & Pannekoek, J. (1998). Statistical research activities at Statistics Netherlands. Research in Official Statistics, 1, 131-134.
Keller, W. J., Kalvelagen, E. M., & Bethlehem, J. G. (1998). Dissemination of statistics on the Internet. Research in Official Statistics, 1, 7-16.