Articles

Significance of Respiratory Symptoms and the Diagnosis of Chronic Bronchitis in a Working Population

BMJ 1959; 2 doi: http://dx.doi.org/10.1136/bmj.2.5147.257 (Published 29 August 1959) Cite this as: BMJ 1959;2:257

This is a PDF-only article. The first page of the PDF of this article appears below.

PDF extract preview

Sign in

Log in through your institution

Free trial

Register for a free trial to thebmj.com to receive unlimited access to all content on thebmj.com for 14 days.
Sign up for a free trial

Subscribe