For citations:
Bilichenko T.N. The prevalence of chronic bronchitis and bronchial asthma (data of epydemiological studies). PULMONOLOGIYA. 1994;(1):78-83. (In Russ.)
Bilichenko T.N. The prevalence of chronic bronchitis and bronchial asthma (data of epydemiological studies). PULMONOLOGIYA. 1994;(1):78-83. (In Russ.)