1. Standard Methods for the Examination of Water and Wastewater;American Public Health Association,1985
2. Standard Methods for the Examination of Water and Wastewater;American Public Health Association,1989
3. Hypolimnetic aeration of a naturally eutrophic lake: physical and chemical effects;Ashley;Can. J. Fish. Aquat. Sci.,1983
4. Hypolimnetic aeration: practical design and application;Ashley;Wat. Res.,1985
5. Preliminary design for a hypolimnetic aeration system for Medical Lake, Washington;Ashley;Contract report to the City of Medical Lake,1990