RT Journal Article SR Electronic T1 X-Rays: Their Origin, Dosage, and Practical Application JF British Journal of Industrial Medicine JO Br J Ind Med FD BMJ Publishing Group Ltd SP 143 OP 143 DO 10.1136/oem.14.2.143 VO 14 IS 2 A1 William G. Clarke YR 1957 UL http://oem.bmj.com/content/14/2/143.abstract AB