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\bibitem{Blommaert_etal1983} {\textquotedblleft}\textit{Trace-element geochemistry of thermal water percolating through a karstic environment in the region of Saint Ghislain (Belgium)}{\textquotedblright}. Blommaert W, Vandelannoote R, Sadurski A, Van {\textquoteright}t dack L, Gijbels R, Journal of volcanology and geothermal research \textbf{19}, 331 (1983).   http://doi.org/10.1016/0377-0273(83)90117-8

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