1. L. K. Wang and M. H. S. Wang, Bubble dynamics and air dispersion mechanisms of air flotation process systems, Part A: material balances. Proceedings of the 44th Industrial Waste Conference, Purdue University, West Lafayette, IN, 505–515, 1989.
2. M. Krofta and L. K. Wang, Bubble dynamics and air dispersion mechanisms of air flotation process systems, Part B: air dispersion. Proceedings of the 44th Industrial Waste Conference, Purdue University, West Lafayette, IN, 516–526, 1989.
3. L. K. Wang and W. J. Mahoney, Treatment of storm run-off by oil-water separation, flotation, filtration and adsorption, Part A: wastewater treatment. Proceedings of the 44th Industrial Waste Conference, Purdue University, West Lafayette, IN, 655–666, 1989.
4. L. K. Wang, M. H. S. Wang, and W. J. Mahoney, Treatment of storm run-off by oil-water separation, flotation, filtration and adsorption, Part B: waste sludge management. Proceedings of the 44th Industrial Waste Conference, Purdue University, West Lafayette, IN, 667–673, 1989.
5. L. K. Wang, Using Air Flotation and Filtration in Removal of Color, Trihalomethane Precursors and Giardia Cysts, New York State Department of Health Workshop on Water Treatment Chemicals and Filtration, Ramada Inn, Saratoga Springs, NY, May, 1989. The 1989 American Slow Sand Association Annual Meeting, Thatcher State Park Regional Maintenance Center, NY, October 20, 1989.