https://www.universitycube.net/urlref/https%3A%2F%2Fwww.worldwidejournals.com%2Fglobal-journal-for-research-analysis-GJRA%2Frecent_issues_pdf%2F2020%2FOctober%2Farsenic-pollution-and-remedial-measures-in-west-bengal-an-overview_October_2020_1262014706_7306639.pdf