Esworthy, Robert, <br/><br/>
2013 national ambient air quality standard (NAAQS) for fine particulate matter (PM2.5) :  designating nonattainment areas / 
Robert Esworthy. 
 - [Library of Congress public edition]. 
 - 1 online resource. 
 - Report / Congressional Research Service ;  R43953 .
 - CRS report ;  R43953. .
<br/><br/> Report includes illustrations.  The CRS report home page provides access to all versions published since 2018 in accordance with P.L. 115-141; earliest version dated 2015.  CRDP Program record. 
<br/><br/>Report includes bibliographical references. 
<br/><br/><label>LCCN: </label>2019231443 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Air--Pollution--United States.<br/>Particles--Environmental aspects--United States.
<br/><br/><label>GPO Item No.: </label>0807-A-07 (online) 
<br/><br/><label>Gov. Doc. Class. No.: </label>LC 14.23:R 43953/