Report of a river pollution survey of England and Wales 1970 

 - Department of the Environment the Welsh Office  London  1971 
 - 39p.  fig., table, map 
 - Volume  I .
<br/><br/><label>Nat. Bib. No.: </label>4619 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Engineering
<br/><br/><label>Universal Decimal Class. No.: </label>628.515  / REP