RT Journal Article SR Electronic T1 Concentration of trace metals in the blood of children. JF British Journal of Preventive & Social Medicine JO Br J Prev Soc Med FD BMJ Publishing Group Ltd SP 100 OP 107 DO 10.1136/jech.27.2.100 VO 27 IS 2 A1 H T Delves A1 B E Clayton A1 J Bicknell YR 1973 UL http://jech.bmj.com/content/27/2/100.abstract AB