1. Census Guide No. 5: Topic Statistics Limiting Long-term Illness;OPCS/RGO(S),1991
2. The content of the 1991 Census: change and continuity;Dale,1993
3. Enumeration districts and wards contain approx. 500 and 5000 individuals respectively.
4. The 1991 Local Base and Small Area Statistics;Cole,1993
5. A User Guide to the SARS;CMU,1993