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Lourens, A.; Beukes, J.; van Zyl, P.; Fourie, G.; Burger, J.; Pienaar, J.; Read, C.; Jordaan, J. Spatial and Temporal Assessment of Gaseous Pollutants in the Highveld of South Africa. S. Afr. J. Sci. 2011, 107 (1/2), 8 pages.