1. 1Technical Group on Waste of Water . Leakage Control Policy and Practice. National Water Council Standing Technical Committee.Report No 26, 1980 .
2. 2UK Water Industry .Managing Leakage Series of Reports, 1994. Report Ref.
3. A. Summary Report: ISBN No. 1 898920 06 0.
4. B. Reporting Comparative Leakage Performance: ISBN No. 1 898920 07 9.
5. C. Setting Economic Leakage Targets: ISBN No. 1 898920 08 7.