http://hdl.handle.net/10204/4640 2013-05-18T18:41:53Z http://hdl.handle.net/10204/4794 Title: The diatom flora in the vicinity of the Pretoria Salt Pan, Transvaal, Republic of South Africa. Part III (final) Authors: Schoeman, FR; Archibald, REM; Ashton, PJ Abstract: This is the third and final contribution on the diatom flora recorded in the vicinity of the pretoria salt pan. In the taxonomic section notes and illustrations (light and electron microscopy) are given for 19 of the 35 listed species. 1984-03-12T00:00:00Z http://hdl.handle.net/10204/4773 Title: The mosquito problem in Oxidation Pounds Authors: Loedolff, C.J Abstract: The use of oxidation pounds (or sewage lagoons) by small communities as a system of sewage purification has been provisionally accepted in Southern Africa for many reason, the most important being the low cost when compared with the conventional sewage works. 2011-01-20T11:32:58Z http://hdl.handle.net/10204/4641 Title: Limnology of some selected South African implementation Authors: Walmsley, MRD (ed); Butty, M (ed) Abstract: In 1972 Department of water affairs and the bureau of standards expressed concern at eutrophication as a water quality problem and requested the water research commission(WRC) to initiate research on its causes. consequences and controls. In 1973 the National Institute for Water Research (NIWR) entered into contract with the WRC to carry out this research. The research programme aimed at obtaining information on the prevention of eutrophication of systems which were not enriched and rehabilitation of the systems where eutrophication problem were being experienced. A document Guideline for the control of eutrophication in South Africa(Walmsley and Butty, 1980) resulted from this work. Description: A collaborative report by Water Research Commission and CSIR 2010-12-09T11:07:15Z