INDUSTRIAL HYGIENE AND MEDICINEBr Med J 1937; 2 doi: https://doi.org/10.1136/bmj.2.4013.1120 (Published 04 December 1937) Cite this as: Br Med J 1937;2:1120
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