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2347417 
Journal Article 
Editorial 
Pulmonary airway clearance mechanisms: A reappraisal 
Van As, A 
1977 
Yes 
American Review of Respiratory Disease
ISSN: 0003-0805 
115 
721-726 
English 
855956 
NAAQS
• ISA-NOx (2016)
     Cited
          2nd Draft
          Final
          Final Cited
• ISA-PM (2019)
     Peer Input Draft
          Chapter 4
     1st Draft
          Chapter 4
     Final ISA
          Chapter 4