Breen, Charles Mackie.Twinch, Allan John.2014-09-082014-09-0819801980http://hdl.handle.net/10413/11163Thesis (Ph.D.)-University of Natal, Pietermaritzburg, 1980.No abstract available.en-ZADams--South Africa.Lake ecology--KwaZulu-Natal.Theses--Botany.Some aspects of phosphorus cycling in Midmar Dam.Thesis