@misc{indiciae288d704714e1,
  title = {The incompetent cervix: a 1982 update.},
  author = {J L Thomason and M B Sampson and C R Beckmann and W N Spellacy},
  year = {1982},
  url = {https://pubmed.ncbi.nlm.nih.gov/7047735/},
  note = {Source identifier: 7047735}
}