TY  - RPRT
TI  - How to construct 'normal ranges' for fetal variables.
AU  - P Royston
AU  - E M Wright
PY  - 1998
DO  - 10.1046/j.1469-0705.1998.11010030.x
UR  - https://pubmed.ncbi.nlm.nih.gov/9511193/
ID  - 9511193
ER  -