TY  - RPRT
TI  - Routine obstetric sonography.
AU  - Roy A Filly
AU  - James P Crane
PY  - 2002
DO  - 10.7863/jum.2002.21.7.713
UR  - https://pubmed.ncbi.nlm.nih.gov/12099557/
ID  - 12099557
ER  -