TY  - RPRT
TI  - Head-to-cervix force: an important physiological variable in labour.
AU  - N Manassiev
PY  - 1997
DO  - 10.1111/j.1471-0528.1997.tb11069.x
UR  - https://pubmed.ncbi.nlm.nih.gov/9070160/
ID  - 9070160
ER  -