TY  - RPRT
TI  - Parameters and standardization in obstetric Doppler.
AU  - R W Gill
PY  - 1990
DO  - 10.1111/j.1540-8175.1990.tb00404.x
UR  - https://pubmed.ncbi.nlm.nih.gov/10149238/
ID  - 10149238
ER  -