1. The BGS digital map production system. Overview of the Logical Data Model;Bain,1993
2. Applied geological mapping in the Southampton area;Edwards;Research Report of the British Geological Survey, ICSO/87/2,1987
3. Applied geological mapping in the Wrexham area: geology and land-use planning;Hains,1991
4. Digital spatial models and geological maps;Loudon,1986
5. Applied geological mapping in the Wrexham area—computing techniques;Loudon;British Geological Survey Technical Report, WO/91/1,1991