TY  - RPRT
TI  - Selective migration by birthweight.
AU  - J Elford
AU  - P Whincup
AU  - A G Shaper
PY  - 1993
DO  - 10.1136/jech.47.4.336
UR  - https://pubmed.ncbi.nlm.nih.gov/8228776/
ID  - 8228776
ER  -