TY  - RPRT
TI  - Placentography by sonar.
AU  - I Donald
AU  - U Abdulla
PY  - 1968
DO  - 10.1111/j.1471-0528.1968.tb02871.x
UR  - https://pubmed.ncbi.nlm.nih.gov/5684427/
ID  - 5684427
ER  -