Sewage plant operator / 
National Learning Corporation 
 - New York :  National Learning Corporation,  c2012 
 - 1 volume (various pagings) :  illustrations ;  28 cm. 
<br/><br/> This is your sewage plant operator passbook. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>9780837324432 
<br/><br/><label>Subjects--Topical Terms: </label><br/>SEWAGE DISPOSAL PLANTS -- EXAMINATIONS, QUESTIONS, ETC
<br/><br/><label>LC Class. No.: </label>TD 420 .S49 2012