1. What is a doctor?;Comfort;Lancet,1972
2. Biological primitives;De Land;Rand Corporation Internal Report,1972
3. Interactive biochemical modelling and analysis;De Land;Rand Corporation Internal Report,1971
4. De Ludi Natura Liber Secundus;Endicott;Datamation,1971
5. Clinical judgement;Feinstein,1967