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\bibitem{VanOijstaeijen_etal2020} {\textquotedblleft}\textit{Farmers{\textquoteright} preferences towards water hyacinth control : a contingent valuation study}{\textquotedblright}. Van Oijstaeijen W, Van Passel S, Cools J, Janssens de Bisthoven L, Huge J, Berihun D, Ejigu N, Nyssen J, Journal Of Great Lakes Research \textbf{46}, 1459 (2020).   http://doi.org/10.1016/J.JGLR.2020.06.009

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