TY  - RPRT
TI  - Constriction ring dystocia.
AU  - D PRYTZ
PY  - 1949
DO  - 10.1111/j.1600-0447.1949.tb07346.x
UR  - https://pubmed.ncbi.nlm.nih.gov/15396338/
ID  - 15396338
ER  -