1. Antenucci, J. C., Brown, K., Croswell, P. L., Kevany, M. J., & Archer, H. (1991). Geographic information systems: A guide to the technology. New York: Van Nostrand Reinhold.
2. Block, M. D. (1996). Geographic information systems: Socio-economic applications (pp. 38–45). London: Routledge.
3. Block, R. (1995). Geocoding of crime incidents using the 1990 TIGER file: The Chicago example. In C. R. Block, M. Dabdoub, & S. Fregly (Eds.), Crime analysis through computer mapping (pp. 189–193). Washington, DC: Police Executive Research Forum.
4. ESRI. (1996). Getting to know ArcView GIS (Chapter 26). New York: Environmental Systems Research Institute.
5. Huxhold, W. E. (1991). An introduction to geographic information systems (pp. 147–184). Oxford, U.K.: Oxford University Press.