Safety and health in wastewater systems / 
prepared by Task Force on Safety and Health in Wastewater Systems ... under the direction of the Operations and Maintenance Subcommittee of the Technical Practice Committee 
 - páginas 
 - Manual of practice ;  no. 1 .
<br/><br/><label>ISBN: </label>1881369382 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plantas depuradoras de agua--Medidas de seguridad<br/>Programa sanitario
<br/><br/><label>LC Class. No.: </label>TD746  / S34 1994