1. Chapter 1 - why water-quality indices;Abbasi,2012
2. Chapter 2 - approaches to WQI formulation;Abbasi,2012
3. Asia Development Bank. Managing Water Resources for Sustainable Socioeconomic Development,2018
4. Reduction in Water Pollution in Yamuna River Due to Lockdown under COVID-19 Pandemic;Arif,2020
5. A water quality index - do we dare?;Brown;Water Sewage Works,1970