| Literature DB >> 13489264 |
Abstract
Entities:
Keywords: AIR POLLUTION/injurious effects; BRONCHITIS/epidemiology; EMPHYSEMA/epidemiology
Mesh:
Year: 1957 PMID: 13489264 PMCID: PMC1962908 DOI: 10.1136/bmj.2.5059.1473
Source DB: PubMed Journal: Br Med J ISSN: 0007-1447