WASET
Letshwenyo, M. , Lebogang, L. (2018). 'Pilot Scale Investigation on the Removal of Pollutants from Secondary Effluent to Meet Botswana Irrigation Standards Using Roughing and Slow Sand Filters'. World Academy of Science, Engineering and Technology, Open Science Index 137, International Journal of Environmental and Ecological Engineering, 12(5), 376 - 384.