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Ali, C. Q., Ross, L. G., & Beveridge, M. C. M. 1991. Microcomputer spreadsheets for the implementation of geographic information systems in aquaculture: a case study on carp in Pakistan. Aquaculture 92 (2-3):199-205. Bossard, E. G., & Zhang. 1993. Loosely coupled PC programs as a framework for spatial analysis. URISA Proceedings:13-24. Campbell, N. 1991. The political economy of GIS: The spreadsheet as a low cost GIS. Cartographica 28 (3: GIS Education and Training):65-74. Eastman, J. R., & Warren, S. 1987. IDRISI: a collective geographic analysis system project. (Chrisman, N. R., Eds.). Auto-Carto 8, Baltimore, MA. ASPRS & ACSM. Eighth International Symposium on Computer-Assisted Cartography, pp: 421-430. Engelen, G., White, R., & Uljee, I. 1995. Integrating Constrained Cellular Automata Models, GIS and Decision tools to Support Urban Planning and Policy Making. 9th European Colloquium on Theoretical and Quantitative Geography, Spa, Belgium. To be published. Goodchild, M. F., & Kemp, K. K., eds. 1990. Introduction to GIS - NCGIA Core Curriculum: National Center for Geographic Information and Analysis, University of California, Santa Barbara. Goodchild, M. F., & Kemp, K. K. 1992. NCGIA education activities: the core curriculum and beyond. International Journal of Geographical Information Systems 6 (4):309-320. Levoy, M. 1994. Spreadsheets for Images. (Mair, S. G., Eds.). SIGGRAPH 94, Orlando, Florida. ACM SIGGRAPH. Annual Conference Series, pp: 139-146. Microsoft Excel for Windows NT 5.0 . Microsoft Corporation. Piff, M. 1991. Discrete Mathematics - An introduction for software engineers: Cambridge University Press. Raper, J., & Green, N. 1992. Teaching the principles of GIS: lessons from the GISTutor project. International Journal of Geographical Information Systems 6 (4):279-290. Rosenfeld, A. 1979. Digital Topology. American Mathematical Monthly 86:621-630. Samet, H. 1989. Applications of Spatial Data Structures: Computer Graphics, Image Processing and GIS. Reading, MA: Addison-Wesley. Tomlin, C. D. 1990. Geographic Information Systems and Cartographic Modeling. Englewood Cliffs, N.J.: Prentice Hall.
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