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Dyfyniad Arddull ChicagoRogerson, Peter. Statistical Methods for Geography: A Student's Guide. 2nd ed. Thousand Oaks, CA: Sage Publications, 2006.
Dyfyniad MLARogerson, Peter. Statistical Methods for Geography: A Student's Guide. 2nd ed. Sage Publications, 2006.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.