Br Med J. 1974 Oct 26;4(5938):233. doi: 10.1136/bmj.4.5938.233-b.
British medical journal
T W Preston
PMID: 4420056 PMCID: PMC1612381 DOI: 10.1136/bmj.4.5938.233-b Free PMC Article
[No abstract available.]