TY  - RPRT
TI  - Current cup designs for obstetric vacuum extraction.
AU  - A Vacca
PY  - 1993
DO  - 10.1111/j.1471-0528.1993.tb15285.x
UR  - https://pubmed.ncbi.nlm.nih.gov/8518257/
ID  - 8518257
ER  -