TY - JOUR T1 - N. HOWARD MUMMERY JF - British Journal of Industrial Medicine JO - Br J Ind Med SP - 259 LP - 259 DO - 10.1136/oem.4.4.259 VL - 4 IS - 4 AU - D.S. Y1 - 1947/10/01 UR - http://oem.bmj.com/content/4/4/259.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -