@misc{indiciaeb842bc72ac9a,
  title = {The trigonal canal.},
  author = {C E Shopfner and J A Hutch},
  year = {1967},
  doi = {10.1148/88.2.209},
  url = {https://pubmed.ncbi.nlm.nih.gov/6016919/},
  note = {Source identifier: 6016919}
}