@misc{indiciaeeae3f0f7d6cd,
  title = {Amplitude-contrast microscopy in histochemistry.},
  author = {G B David and B S Williamson},
  year = {1971},
  doi = {10.1007/bf00263363},
  url = {https://pubmed.ncbi.nlm.nih.gov/5565032/},
  note = {Source identifier: 5565032}
}