TY  - RPRT
TI  - Posture in labour.
AU  - P Stewart
AU  - H Spiby
PY  - 1989
DO  - 10.1111/j.1471-0528.1989.tb03221.x
UR  - https://pubmed.ncbi.nlm.nih.gov/2692696/
ID  - 2692696
ER  -