%0 Journal Article %T The cost of water hyacinth control in South Africa: a case study of three options %A van Wyk, E %A van Wilgen, B W %J African Journal of Aquatic Science %V 27 %N 2 %P 141-149 %@ 1727-9364 %D 2002-01-01 %I Taylor & Francis Group %~ DeepDyve