River pollution survey of England and Wales, updated 1973 river quality and discharges of sewage and industrial effluents
Great Britain.Department of the Environment.
Great Britain.Welsh Office.
London H.M.S.O.
1975
'Taken together this present report and Volume 3 ["Report of a river pollution survey of England and Wales, 1973"] provide information on all controlled waters covered by the Rivers (Prevention of Pollution) Acts, 1951 to 1961' - Preface
Water