Rahman, MM, Mondal, D, Das, B, Sengupta, MK, Ahamed, S, Hossain, A, Samal, A, Saha, KC, Mukherjee, SC, Chakraborti, D, "Status of groundwater arsenic contamination in all 17 blocks of Nadia district in the state of West Bengal, India : a 23-year study report", Journal of Hydrology, 2014