TY  - RPRT
TI  - The umbilical cord: normal parameters.
AU  - G Ente
AU  - P H Penzer
PY  - 1991
DO  - 10.1177/146642409111100406
UR  - https://pubmed.ncbi.nlm.nih.gov/1941874/
ID  - 1941874
ER  -