RT Journal Article SR Electronic T1 Blood Groups JF Journal of the Royal Army Medical Corps JO J R Army Med Corps FD British Medical Journal Publishing Group SP e1 OP e1 DO 10.1136/jramc-74-05-11 VO 74 IS 5 A1 H. Marrian Perry YR 1940 UL http://militaryhealth.bmj.com/content/74/5/e1.abstract AB