Janse van Vuuren, S., Swanepoel, A. and van Zyl, G. 2013. Long-term changes in the algal composition of the Vaal River, South Africa � did the Lesotho Highlands Water Project play a role?. Suid-Afrikaans Tydskrif vir Natuurwetenskap en Tegnologie / <i>South African Journal of Science and Technology</i&gt;. 32, 1 (Mar. 2013), 10 bladsye. DOI:https://doi.org/10.4102/satnt.v32i1.335.