1. Purchasing diemmas;Heginbotham, C.; Ham, C.,1992
2. Priority setting for health gain;Ham, C.; Honigsbaum, F.; Thompson, D.
3. Effective health care;University of Leeds; University of York,1992
4. Choices in health care;Ministry of Welfare, Health, and Cultural Affairs;Rijswijk.l The Ministry,1992
5. Health care variations;Ham, C.,1988