1. Anon, 1999. Key Indicators Mapping System User’s Manual. Food and Agriculture Organisation, World Agricultural Information Centre of the FAO (FAO-WAICENT), Rome, 65 pp.
2. Atzeni, P., Ceri, S., Paraboschi, S., Torlone, R., 1999. Database Systems—Concepts, Languages and Architectures. McGraw-Hill, London, pp. 465–488.
3. Bailey, T.C., Gatrell, A.C., 1995. Interactive spatial data analysis. Longman Scientific and Technical, Harlow, pp. 303–308.
4. Towards an atlas of human helminth infection in Sub-Saharan Africa: the use of Geographical Information Systems (GIS);Brooker;Parasitol. Today,2000
5. Cameron, A.R., 1997. Active surveillance and GIS as components of an animal health information system for developing countries: Thailand and Laos as examples. Ph.D. Thesis. Queensland, 325 pp.