Zhao, M <br/><br/>
[Further study on COPD].  [electronic resource] 

 -  Zhonghua jie he he hu xi za zhi = Zhonghua jiehe he huxi zazhi = Chinese journal of tuberculosis and respiratory diseases  Feb 1999 
 - 69 p.  digital 
<br/><br/> Publication Type: Editorial 
<br/><br/><label>ISSN: </label>1001-0939 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Humans<br/>Pulmonary Disease, Chronic Obstructive--etiology