1.
Med Welt
; 33(22): 813-6, 1982 Jun 04.
Article
in German
| MEDLINE
| ID: mdl-7109919
Subject(s)
Bronchitis/etiology , Age Factors , Aged , Air Pollution , Body Constitution , Bronchitis/chemically induced , Bronchitis/complications , Chronic Disease , Humans , Middle Aged , Risk , Syndrome
2.
Med Welt
; 33(21): 775-82, 1982 May 28.
Article
in German
| MEDLINE
| ID: mdl-7098844