@misc{indiciae505d35ec2daa,
  title = {Crushed cement concrete substitution for construction aggregates; a materials flow analysis},
  author = {Thomas Kelly},
  year = {1998},
  doi = {10.3133/cir1177},
  url = {https://pubs.usgs.gov/publication/cir1177},
  note = {Source identifier: cir1177}
}