(2002). An introduction to geographical information systems (2nd ed.). Prentice Hall ; Dorling Kindersley.
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Dyfyniad Arddull Chicago
An Introduction to Geographical Information Systems. 2nd ed. Harlow, England ; New York ; New Deli: Prentice Hall ; Dorling Kindersley, 2002.
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Dyfyniad MLA
An Introduction to Geographical Information Systems. 2nd ed. Prentice Hall ; Dorling Kindersley, 2002.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.