TY  - RPRT
TI  - Selective migration by birthweight.
AU  - C N Martyn
AU  - D J Barker
AU  - C Osmond
PY  - 1993
DO  - 10.1136/jech.47.1.76
UR  - https://pubmed.ncbi.nlm.nih.gov/8436901/
ID  - 8436901
ER  -