Hamer, P <br/><br/>
Industrial-Water-Treatment-Practice / 
P. Hamer. 
 - [London] :  Butterworth,  1961.++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 
<br/><br/><label>Universal Decimal Class. No.: </label>628.1.034.2