Br Med J. 1968 Feb 24;1(5590):515-6. doi: 10.1136/bmj.1.5590.515-d.
British medical journal
J B Metcalfe
PMID: 5643739 PMCID: PMC1985125 DOI: 10.1136/bmj.1.5590.515-d Free PMC Article
[No abstract available.]