RT Journal Article SR Electronic T1 Application of a New Ergometer to develop a Laboratory Test for Work Capacity JF British Journal of Preventive & Social Medicine JO Br J Prev Soc Med FD BMJ Publishing Group Ltd SP 169 OP 178 DO 10.1136/jech.9.4.169 VO 9 IS 4 A1 Frank S. Cotton YR 1955 UL http://jech.bmj.com/content/9/4/169.abstract AB