de Kock, Kenné, and Corrie Wolmarans. 2008. “Distribution and Habitats of Pisidium Viridarium Kuiper, 1956 (Bivalvia: Sphaeriidae) As Reflected by the Records of the National Freshwater Snail Collection of South Africa”. Suid-Afrikaans Tydskrif Vir Natuurwetenskap En Tegnologie / <i>South African Journal of Science and Technology</I&gt; 27 (3), 183-95. https://doi.org/10.4102/satnt.v27i3.90.