Michels, J <br/><br/>
The silhouette sign on an inspiration-expiration pair of radiographs.  [electronic resource] 

 -  Journal belge de radiologie  1981 
 - 251-4 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0302-7430 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Bronchography<br/>Humans<br/>Lung--physiology<br/>Pulmonary Artery--diagnostic imaging<br/>Respiration