Safety, health, and security in wastewater systems / 
prepared by the Safety, Health, and Security in Wastewater Systems Task Force of the Water Environment Federation. 
 - 6th ed. 
 - New York :  McGraw-Hill,  2013. 
 - xxxiii, 437 p. :  ill. ;  25 cm. 
 - WEF manual of practice ;  no. 1. .
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0071780939 (hbk.) 9780071780933 (hbk.)  RM327.20 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sewage--Purification--Safety regulations.