Leading Articles

Value of Research on Twins

Br Med J 1940; 1 doi: https://doi.org/10.1136/bmj.1.4128.261 (Published 17 February 1940) Cite this as: Br Med J 1940;1:261

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