Br Med J. 1970 Feb 21;1(5694):495. doi: 10.1136/bmj.1.5694.495-a.
British medical journal
G N Tilsley, W E Greaves
PMID: 5435155 PMCID: PMC1699467 DOI: 10.1136/bmj.1.5694.495-a Free PMC Article
[No abstract available.]