@misc{indiciae1d1338958d99,
  title = {A cheap and useful compensated polarizing microscope.},
  author = {D S Owen},
  year = {1971},
  doi = {10.1056/nejm197111112852031},
  url = {https://pubmed.ncbi.nlm.nih.gov/5095757/},
  note = {Source identifier: 5095757}
}