DE KOCK, K.; WOLMARANS, C. 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;, v. 27, n. 3, p. 183-195, 16 set. 2008.