@article{,
      note = {"Prepared by Midwest Research Institute"--P. iii.},
      url = {http://library.usi.edu/record/186951},
      title = {Review of surface coal mining emission factors  [microform].},
      publisher = {Emission Factor and Inventory Group, Emissions,  Monitoring, and Analysis Division, Office of Air Quality  Planning   and Standards, U.S. Environmental Protection  Agency,},
      number = {EPA-454/R-95-007},
      recid = {186951},
      pages = {v, 48 p. :},
      address = {Research Triangle Park, NC :},
      year = {1991},
}