@misc{indiciae8f545e1ecf15,
  title = {[Classification and morphological and structural analysis of biliary calculi].},
  author = {F Colombo and M Gioetto},
  year = {1981},
  url = {https://pubmed.ncbi.nlm.nih.gov/7285261/},
  note = {Source identifier: 7285261}
}