@article{Langerman_2019, title={The use of long-term datasets for informing and evaluating air quality policy initiatives}, volume={29}, url={https://cleanairjournal.org.za/article/view/7723}, DOI={10.17159/caj/2019/29/2.7723}, number={2}, journal={Clean Air Journal}, author={Langerman, Kristy}, year={2019}, month={Dec.} }