Dhliwayo, D.K.W.Fernandes, T.R.C.Straaten, P. van2011-06-222011-06-221997http://hdl.handle.net/10625/46330Text1 digital file (71 p. : ill.)enZIMBABWEPHOSPHATESFERTILIZER USEMININGPhosphate rock blends : developing local alternatives (Zimbabwe) : final reportIDRC Final Report