TY - JOUR T1 - Astronavigation JF - Journal of the Royal Army Medical Corps JO - J R Army Med Corps SP - 312 LP - 315 DO - 10.1136/jramc-96-05-09 VL - 96 IS - 5 AU - F. M. Richardson Y1 - 1951/05/01 UR - http://militaryhealth.bmj.com/content/96/5/312.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -