@misc{indiciae063930a205c2,
  title = {A new retractor for rectal biopsy.},
  author = {A R Beck},
  doi = {10.1016/0022-3468(72)90137-6},
  url = {https://pubmed.ncbi.nlm.nih.gov/5038470/},
  note = {Source identifier: 5038470}
}