PT - JOURNAL ARTICLE ED - , TI - Abstracts AID - 10.1136/oem.3.2.100 DP - 1946 Apr 01 TA - British Journal of Industrial Medicine PG - 100--110 VI - 3 IP - 2 4099 - http://oem.bmj.com/content/3/2/100.short 4100 - http://oem.bmj.com/content/3/2/100.full SO - Br J Ind Med1946 Apr 01; 3