?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=J&rft.au=Nyamangara%2C+J&rft.aulast=Nyamangara&rft.atitle=Long-term+nitrate+and+phosphate+loading+of+river+water+in+the+Upper+Manyame+Catchment%2C+Zimbabwe&rft.title=Water+SA+&rft.issn=0378-4738&rft.date=2013&rft.volume=39&rft.pages=637-642&rft.genre=article