RT Journal Article SR Electronic T1 Concerning A Free-Martin JF Journal of the Royal Army Medical Corps JO J R Army Med Corps FD British Medical Journal Publishing Group SP 62 OP 63 DO 10.1136/jramc-37-01-05 VO 37 IS 1 A1 Robert Firth YR 1921 UL http://militaryhealth.bmj.com/content/37/1/62.abstract AB