@misc{indiciae02dcbefb4cd5, title = {Incompetent internal cervical os; case presentation.}, author = {R H BARTER and A F LASH}, year = {1959}, doi = {10.1016/0002-9378(59)90380-1}, url = {https://pubmed.ncbi.nlm.nih.gov/13649812/}, note = {Source identifier: 13649812} }