Johnson, B M <br/><br/>
An overview: spirometry standards.  [electronic resource] 

 -  Respiratory therapy   
 - 29, 31-2 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0048-7392 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Reference Standards<br/>Spirometry--instrumentation<br/>United States