TY  - RPRT
TI  - The missing umbilical artery. I. Prospective study based on a maternity unit.
AU  - E M Bryan
AU  - H G Kohler
PY  - 1974
DO  - 10.1136/adc.49.11.844
UR  - https://pubmed.ncbi.nlm.nih.gov/4474841/
ID  - 4474841
ER  -