TY  - RPRT
TI  - Emergency obstetrical ultrasonography.
AU  - P M Doubilet
AU  - C B Benson
PY  - 1998
DO  - 10.1016/s0037-198x(98)80041-2
UR  - https://pubmed.ncbi.nlm.nih.gov/9800244/
ID  - 9800244
ER  -