1. Cmnd 289;D Acheson,1988
2. Albert, D. P., Gesler, W. M., & Wittie, P. S. (1995). Geographic information systems and health: An educational resource. Journal of Geography, 94(2), 350–356.
3. Albert, D. P., Gesler, W. M., & Levergood, B. (2000). Spatial analysis, GIS, and remote sensing applications in the health sciences. Chelsea: Ann Arbor Press.
4. Ali, M., Rasool, S., Park, J.-K., Saeed, S., Ochiai, R., & Nizami, Q. (2004). Use of satellite imagery in constructing a household GIS database for health studies in Karachi, Pakistan. International Journal of Health Geographics, 3(1), 20.
5. Anjaneyulu, G. (1985). A study of polio myelities case admitted in government hospital, Hyderabad. Indian Journal of Public Health, 32(2), 97.