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\bibitem{Gijbels_etal1977} {\textquotedblleft}\textit{Application of trace element analysis to geothermal waters}{\textquotedblright}. Gijbels R, van Grieken R, Blommaert W, Vandelannoote R, Van {\textquoteright}t dack L, , 429 (1977)

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