TY  - RPRT
TI  - Measuring gestational age: an uncertain proposition.
AU  - A T Berg
AU  - M B Bracken
PY  - 1992
DO  - 10.1111/j.1471-0528.1992.tb13722.x
UR  - https://pubmed.ncbi.nlm.nih.gov/1581272/
ID  - 1581272
ER  -