4Rogers, Peter P., et al.. Measuring Environmental Quality in Asia. Harvard University Press, 1997
5Water Management: Policies, Guidelines, Provincial Water Quality Objectives of the Ministry of Environment and Energy, Queen' s Printer for Ontario, July 1994, Reprinted February 1999.(http://www.ene.gov.on.ca)
6Wood, Leslie B.. The Restoration of the Tidal Thames. Adam Hilger Ltd, Bristol, 1982
