@article{846326,
  author = {S Heller-zeisler and J Ondov and Rolf Zeisler},
  title = {Collection and Characterization of a Bulk PM<sub>2.5</sub> Air Particulate Matter Material for Use in Reference Materials},
  year = {1999},
  number = {71-72},
  month = {1999-12-01 00:12:00},
  publisher = {Biological Trace Element Research},
  language = {en},
}