INGELFINGER, F J <br/><br/>
Dysphagia produced by a contractile ring in the lower esophagus.  [electronic resource] 

 -  Gastroenterology  Mar 1953 
 - 419-30 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0016-5085 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Deglutition<br/>Deglutition Disorders--etiology<br/>Esophagus--abnormalities<br/>Humans