Advances in water pollution research 
/ Proceedings of the Fourth International Conference held in Prague 1969 
 - Oxford:   Pergamon Press,   1969 
 - xii, 936p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Proceedings
<br/><br/><label>Universal Decimal Class. No.: </label>628.19.001.5(05)