River pollution survey of England and Wales, updated 1975  river quality and discharges of sewage and industrial effluents 
Department of the Environment and the Welsh Office 
 - London  H. M. S. O.  1978 
 - 60p. forms, col. maps 31cm 
<br/><br/> Booklet (vii,59p. : Sd), 10 fold. sheets ( 10  sides) 
<br/><br/><label>ISBN: </label>0117510203 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water--Pollution--England