RT Journal Article SR Electronic T1 Birth Weights of South African Babies JF British Journal of Social Medicine JO Br J Soc Med FD BMJ Publishing Group Ltd SP 247 OP 253 DO 10.1136/jech.5.4.247 VO 5 IS 4 A1 Salber, Eva J. A1 Bradshaw, Evelyn S. YR 1951 UL http://jech.bmj.com/content/5/4/247.abstract AB