1. 1993. Connecting the 1981 and 1991 Censuses. NE RRL Research Report 93/9. CURDS, University of Newcastle upon Tyne.
2. 1991. Statutory Instrument 1991 No 695, The District of Welwyn Hatfield (Electoral Arrangements) Order 1991. Home Office, HMSO: London. www.hmso.gov.uk/si/si19910695_en_1htm [accessed 10/07/01].
3. Creating a temporally consistent spatial framework for the analysis of inter- regional migration in Australia
4. A method for integrating the 1981 and 1991 British census interaction data
5. Department of the Environment. 1987. Handling Geographic Information: The Report of the Committee of Enquiry Chaired by Lord Chorley: the Chorley Report. HMSO: London.