TY - JOUR T1 - Hutchison's Clinical Methods JF - British Journal of Industrial Medicine JO - Br J Ind Med SP - 141 LP - 142 DO - 10.1136/oem.14.2.141-a VL - 14 IS - 2 AU - P. R. Boyd Y1 - 1957/04/01 UR - http://oem.bmj.com/content/14/2/141.2.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -