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De druk van de collectieve lasten en de omvang van de collectieve sector
Pallada, F. W. M., (1982)
Sozialbudget 1980 : Leistungsentwicklung, Finanzierungsstruktur, Haushaltsprobleme
Dornbusch, Hans-Ludwig, (1981)
Paying for the social services
Crossman, R. H. S., (1969)
Evolutionary information systems : proceedings of the IFIP TC 8 Working Conference on Evolutionary Information Systems, Budapest, Hungary, 1 - 3 September, 1981
Hawgood, John, (1982)
Effective decision support systems
Hawgood, John, (1987)
Informatics is a Social Science
Hawgood, John, (1973)