info:oai:icrisat:7046info:ofi/fmt:xml:xsd:journalOlawumiI SOlawumi, I SMatthewsNMatthews, NJordaanHJordaan, HKundhlandeGKundhlande, GThe economic cost of air pollution in Mangaung metro municipality: A case study in South AfricaAfrican Journal of Environmental Science and Technology 1996-0786 20137718-7247article