@misc{indiciaeba7d61a9c2a0,
  title = {Materials in the economy; material flows, scarcity, and the environment},
  author = {Lorie A. Wagner},
  year = {2002},
  doi = {10.3133/cir1221},
  url = {https://pubs.usgs.gov/publication/cir1221},
  note = {Source identifier: cir1221}
}