Research Article
Diseases of the respiratory system: cough suppressants, expectorants, and mucolytic agents.
Br Med J 1978; 1 doi: https://doi.org/10.1136/bmj.1.6121.1202 (Published 06 May 1978) Cite this as: Br Med J 1978;1:1202This is a PDF-only article. The first page of the PDF of this article appears above.