TY  - RPRT
TI  - Cervical sonography: a review.
AU  - J Sonek
AU  - C Shellhaas
PY  - 1998
DO  - 10.1046/j.1469-0705.1998.11010071.x
UR  - https://pubmed.ncbi.nlm.nih.gov/9511202/
ID  - 9511202
ER  -