Spellmann, Frank R <br/><br/>
Spellman's standard handbook for wastewater operators 

 - 2nd ed. 
 - Boca ration  CRC press  2011 
 - 3v. 
<br/><br/> v.1. Fundamental level.-v.2. Intermediate level.-v.3. Advanced level 
<br/><br/><label>ISBN: </label>9781439818848 
<br/><br/><label>Subjects--Index Terms: </label>Sewage disposal - employees certification - handbooks 
<br/><br/><label>Universal Decimal Class. No.: </label>628.393(035)  / SPE.1