Correspondence

Function and design

Br Med J 1969; 4 doi: https://doi.org/10.1136/bmj.4.5675.113-a (Published 11 October 1969) Cite this as: Br Med J 1969;4:113

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

Subscribe