@misc{indiciae9f79d9f5b7d6,
  title = {Calcite sputum lith. Characterization by analytic scanning electron microscopy and X-ray diffraction.},
  author = {K P Pritzker and S D Desai and M C Patterson and P T Cheng},
  year = {1981},
  doi = {10.1093/ajcp/75.2.253},
  url = {https://pubmed.ncbi.nlm.nih.gov/7468529/},
  note = {Source identifier: 7468529}
}