TY  - RPRT
TI  - A simple low-cost obstetric teaching aid.
AU  - E Hill
AU  - M Lethbridge
PY  - 1992
DO  - 10.1177/004947559202200114
UR  - https://pubmed.ncbi.nlm.nih.gov/1542958/
ID  - 1542958
ER  -