TY  - RPRT
TI  - Prolonged labor.
AU  - H FIELDS
AU  - J W GREENE
AU  - R R FRANKLIN
PY  - 1959
DO  - 10.1016/0002-9378(59)90265-0
UR  - https://pubmed.ncbi.nlm.nih.gov/13606169/
ID  - 13606169
ER  -