[Further study on COPD].
Zhao, M
[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
Publication Type: Editorial
1001-0939
Humans
Pulmonary Disease, Chronic Obstructive--etiology
[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
Publication Type: Editorial
1001-0939
Humans
Pulmonary Disease, Chronic Obstructive--etiology