Harmon, J. E. (2003). The Design and Implementation of Geographic Information Systems. Wiley & Sons, Inc..
शिकागो स्टाइल उद्धरणHarmon, John E.. The Design and Implementation of Geographic Information Systems. Wiley & Sons, Inc., 2003.
एमएलए उद्धरणHarmon, John E.. The Design and Implementation of Geographic Information Systems. Wiley & Sons, Inc., 2003.
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