TY - JOUR T1 - Radioactivity JF - British Journal of Industrial Medicine JO - Br J Ind Med SP - 327 LP - 328 DO - 10.1136/oem.21.4.327-c VL - 21 IS - 4 AU - G. E. Harrison Y1 - 1964/10/01 UR - http://oem.bmj.com/content/21/4/327.4.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -