Confined space entry :  a special publication / 
prepared by Task Force on Confined Space Entry, Michael W. Myers, chair, under the direction of the Operations and Maintenance Subcommittee of the Technical Practice Committee 
 - páginas 
<br/><br/><label>ISBN: </label>1881369390 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plantas para tratamiento de agua--Medidas de seguridad
<br/><br/><label>LC Class. No.: </label>TD434  / C65