@misc{indiciae84bbc915269d,
  title = {Roadless space of the conterminous United States},
  author = {R.D. Watts and R.W. Compton and J.H. McCammon and C.L. Rich and S.M. Wright and T. Owens and D.S. Ouren},
  year = {2007},
  doi = {10.1126/science.1138141},
  url = {https://pubs.usgs.gov/publication/70029732},
  note = {Source identifier: 70029732}
}