Burrough, P. A.1986: Principles of geographical information systems for land resources assessment. Oxford: Clarendon Press.
2.
Burrough, P. A. and McDonnell, R. A.1998: Principles of geographical information systems. Oxford: Oxford University Press.
3.
Coppock, J. T. and Rhind, D. W.1991: The history of GIS. In Maguire, D. J., Goodchild, M. F. and Rhind, D. W., editors, Geographical information systems, Marlow: Longman, 21-43.
