PT - JOURNAL ARTICLE ED - , TI - British Occupational Hygiene Society AID - 10.1136/oem.13.2.152 DP - 1956 Apr 01 TA - British Journal of Industrial Medicine PG - 152--153 VI - 13 IP - 2 4099 - http://oem.bmj.com/content/13/2/152.short 4100 - http://oem.bmj.com/content/13/2/152.full SO - Br J Ind Med1956 Apr 01; 13