@techreport{e1994chicagos,
  title = {Chicago's Urban Forest Ecosystem: Results of the Chicago Urban Forest Climate Project}
  author = {E. Gregory McPherson; David J. Nowak; Rowan A. Rowntree},
  url = {https://www.nrs.fs.fed.us/pubs/gtr/gtr_ne186.pdf},
  year = {1994}
}