Contamination of Household Open Wells in an Urban Area of Trivandrum, Kerala State, India: A Spatial Analysis of Health Risk Using Geographic Information System oleh Mohan Ananth, Reghunath Rajesh, Rajeevan Amjith, Achu A L, Mathew J Valamparampil, M Harikrishnan, M S Resmi, K B Sreekanth, Varghese Sara, S Sethulekshmi, V Prasannakumar, S K Deepthi, Aby Jose Jemin, D S Krishna, T S Anish, Ilyas Selene Insija, Zinia T Nujum