1. The Infrastructure “Crisis.”;Cromwell;Jour. AWWA,2007
2. GAO (General Accounting Office) 2004 Water Infrastructure: Comprehensive Asset Management Has Potential to Help Utilities Better Identify Needs and Plan Future Investments, GAO-04-461 www.gao.gov/new.items/d04461.pdf
3. ISR: Massachusetts Wastewater Facilities 2007 Out of Sight Should Not Be Out of Mind! Massachusetts Infrastructure Investment Coalition, Boston www.newea.org/MIIC%20-%20Infrastructure%20Status%20Report%20WasteWater%205-8-07.pdf
4. USEPA (US Environmental Protection Agency) 2008 Sustainable Infrastructure for Water and Wastewater www.epa.gov/waterinfrastructure