@misc{indiciae45ca4314a2c8,
  title = {A new comprehensive approach to characterizing carbonaceous aerosol with an application to wintertime Fresno, California PM2.5},
  author = {P. Herckes and J.A. Leenheer and J.L. Collett},
  year = {2007},
  url = {https://pubs.usgs.gov/publication/70030202},
  note = {Source identifier: 70030202}
}