RT Journal Article SR Electronic T1 Head circumference charts updated. JF Archives of Disease in Childhood JO Arch Dis Child FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP 927 OP 928 DO 10.1136/adc.61.9.927-a VO 61 IS 9 A1 Paul, A A A1 Ahmed, E A A1 Whitehead, R G YR 1986 UL http://adc.bmj.com/content/61/9/927.1.abstract AB