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2. Environmental Impact Assessment: Available Techniques, Emerging Trends;Abbasi,2000
3. Chapter 4: Water Composition: Management of Salinity, Hardness, and Evaporation. Dynamic Aquaria;Adey,2007
4. Water indices: specification, criteria, and applications—a case study;Ahirvar,2020
5. Water samples from Johor rivers show high levels of chemical waste, says rep;Ahmad,2016