G.P. Filing SystemBr Med J 1967; 1 doi: https://doi.org/10.1136/bmj.1.5536.368-e (Published 11 February 1967) Cite this as: Br Med J 1967;1:368
Log in using your username and password
Log in through your institution
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