@article{,
      note = {"May 29, 1998."},
      author = {Watson, John G.},
      url = {http://library.usi.edu/record/223061},
      title = {Guidance for using continuous monitors in PM₂₅̣  monitoring networks [microform] /},
      publisher = {U.S. Environmental Protection Agency, Office of Air  Quality Planning and Standards,},
      number = {EPA-454/R-98-012},
      recid = {223061},
      pages = {1 v. (various pagings) :},
      address = {Research Triangle Park, N.C. :},
      year = {1998},
}