1. Land Information Management;Dale,1988
2. Interactive Graphics in CAD;Gardan,1984
3. Principles of Geographical Information Systems for Land Resources Assessment;Burrough,1987
4. A Conceptual Framework and Comparison of Spatial Data Models;Peuquet;Cartographica,1984
5. Digital Line Graphs from 1:24,000-Scale Maps;Allder,1985