Hepper, N G <br/><br/>
Cigarette smoking and chronic respiratory disease.  [electronic resource] 

 -  Minnesota medicine  Sep 1969 
 - 1373-5 passim p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0026-556X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Bronchitis--etiology<br/>Chronic Disease<br/>Humans<br/>Lung Diseases--etiology<br/>Male<br/>Pulmonary Emphysema--etiology<br/>Smoking--complications