TY  - RPRT
TI  - [Study of umbilical cord coiling and variable deceleration].
AU  - M Kitagawa
PY  - 1989
DO  - 10.1272/jnms1923.56.22
UR  - https://pubmed.ncbi.nlm.nih.gov/2732302/
ID  - 2732302
ER  -