[RESEARCH ON THE VIRAL ETIOLOGY OF SOME CHRONIC PNEUMOPATHIES].
D001249:Asthma; D001991:Bronchitis; D006801:Humans; D008171:Lung Diseases; D011656:Pulmonary Emphysema; D012106:Research; D012282:Rickettsia Infections
ASTHMA; BRONCHITIS; PULMONARY EMPHYSEMA; RICKETTSIAL DISEASES