Br Med J. 1968 Mar 16;1(5593):708. doi: 10.1136/bmj.1.5593.708-d.
British medical journal
I Krass
PMID: 5640667 PMCID: PMC1985354 DOI: 10.1136/bmj.1.5593.708-d Free PMC Article
[No abstract available.]