1. , , and . 1975. A Virus-in-Water Study of Finished Water from Six Communities. U. S. Environmental Protection Agency, Project Summary, EPA-600/1-75-003. Cincinnati, OH.
2. Waterborne Outbreaks in Sweden – Causes and Etiology
3. Status of Waterborne Diseases in the US and Canada
4. Habitat Association of Klebsiella Species
5. 1980. General impact of eutrophication on public water preparation. In Restoration of Lakes and Inland Waters, U. S. Environmental Protection Agency, EPA 440/5-81-010, Office of Water Regulations and Standards, Washington, DC.