@misc{indiciae1e5294aec695,
  title = {Emission standards for particulates.},
  author = {G W Walsh},
  year = {1974},
  doi = {10.1080/00022470.1974.10470024},
  url = {https://pubmed.ncbi.nlm.nih.gov/4448873/},
  note = {Source identifier: 4448873}
}