Pankratz, Tom M. <br/><br/>
Wastewater treatment :  an environmental primer / 
by Tom M. Pankratz ; illustrated by Jonathan B. Skaines. 
 - Houston, :  Lone Oak Pub.,  c1993. 
 - 63 p. :  ill. ;  22 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0929244001(pbk. ) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sewage--Purification--Popular works.<br/>Sewage disposal plants--Popular works.