1. Environmental Pollution Control Engineering;Rao,1991
2. “Pharmaceutical Plants Waste”, From “Waste -Water Treatment”;Rao,1987
3. “Waste Audit Study: Drug Manufacturing and Processing Industry.” Report Prepared by ICF Technology Inc.,Universal City, California for the Alternative Technology Section, Toxic Substances Control Division, California dept. Of Health Services;Calif. DHS,1989
4. The scientific basis of flocculation;Coagulation in Wastewater Treatment,1978
5. “Chemical Unit Processes” From “Waste Water Engineering”;Metcalf,1991