@misc{indiciae5dbfe2ca4cd1,
  title = {Emission modifications: overview.},
  author = {R E Neligan},
  year = {1975},
  doi = {10.1289/ehp.7510203},
  url = {https://pubmed.ncbi.nlm.nih.gov/50937/},
  note = {Source identifier: 50937}
}