TY  - RPRT
TI  - Guidance for cerclage using transrectal sonography.
AU  - A C Fleischer
AU  - S Lombardi
AU  - D M Kepple
PY  - 1989
DO  - 10.7863/jum.1989.8.10.589
UR  - https://pubmed.ncbi.nlm.nih.gov/2681832/
ID  - 2681832
ER  -