Book Review

Studying a Representative Sample of Children

Br Med J 1967; 2 doi: https://doi.org/10.1136/bmj.2.5555.824 (Published 24 June 1967) Cite this as: Br Med J 1967;2:824

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