@misc{indiciaebf21939df14f,
  title = {Emission control devices, fuel additive, and fuel composition changes.},
  author = {W T Piver},
  year = {1977},
  doi = {10.1289/ehp.7719309},
  url = {https://pubmed.ncbi.nlm.nih.gov/71235/},
  note = {Source identifier: 71235}
}