Clarke,Keith C. (2004). Geographic information systems and environmental modeling. Prentice hall India.
Dyfyniad Arddull ChicagoClarke,Keith C. Geographic Information Systems and Environmental Modeling. New Delhi: Prentice hall India, 2004.
Dyfyniad MLAClarke,Keith C. Geographic Information Systems and Environmental Modeling. Prentice hall India, 2004.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.