Research Article

Air pollution: I--From pea souper to photochemical smog.

BMJ 1991; 303 doi: http://dx.doi.org/10.1136/bmj.303.6815.1459 (Published 07 December 1991) Cite this as: BMJ 1991;303:1459

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

PDF extract preview