Allen, D. W., & Coffey, J. M. (2011). GIS tutorial 3: Advanced workbook. ESRI Press.
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Dyfyniad Arddull Chicago
Allen, David W., and Jeffery M. Coffey. GIS Tutorial 3: Advanced Workbook. Redlands, CA: ESRI Press, 2011.
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Dyfyniad MLA
Allen, David W., and Jeffery M. Coffey. GIS Tutorial 3: Advanced Workbook. ESRI Press, 2011.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.