WR Harding, JC Taylor. Diatoms as indicators of historical water quality: A comparison of samples taken in the Wemmershoek catchment (Western Province, South Africa) in 1960 and 2008. WSA [Internet]. 2025 Mar. 30 [cited 2025 May 10];40(4 October). Available from: https://watersa.net/article/view/21711