@misc{indiciae9dd0973de832,
  title = {"Pseudocalculus" defect in cholangiography.},
  author = {P D de Villiers and C A Schulenburg},
  year = {1974},
  url = {https://pubmed.ncbi.nlm.nih.gov/4445931/},
  note = {Source identifier: 4445931}
}