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\bibitem{Subramanian_etal1988} {\textquotedblleft}\textit{Heavy metals in the Ganges estuary}{\textquotedblright}. Subramanian V, Jha PK, Van Grieken R, Marine pollution bulletin \textbf{19}, 290 (1988).   http://doi.org/10.1016/0025-326X(88)90602-9

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