@misc{indiciae4c6a48193a07,
  title = {Light-field microscope versus microprojector in determining coal dust concentrations.},
  author = {P Zullo and E Digon},
  doi = {10.1080/00028896709342516},
  url = {https://pubmed.ncbi.nlm.nih.gov/6032404/},
  note = {Source identifier: 6032404}
}