TY  - RPRT
TI  - Dysfunctional labor. II. Protracted active-phase dilatation in the nullipara.
AU  - E A FRIEDMAN
AU  - M R SACHTLEBEN
PY  - 1961
UR  - https://pubmed.ncbi.nlm.nih.gov/13702001/
ID  - 13702001
ER  -