Longley, Paul A., Michael, F. Goodchild, David J. Maguire, David W. Rhind. 2005. Geographic Information Systems and Science, 2nd Edition. Chichester: John Wiley and Sons. Chapters: 1, 3, 4, 5, 6, 9, 10, 12, 14, 15, 18.
Steinberg, S.J. and S.L. Steinberg. 2006. GIS: Geographic Information Systems for the Social Sciences: Investigating Space and Place: London: Sage. 216 pp.
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