@misc{indiciae9da4c1e71a86,
  title = {Aggregates from natural and recycled sources; economic assessments for construction applications; a materials flow study},
  author = {David R. Wilburn and Thomas G. Goonan},
  year = {1998},
  doi = {10.3133/cir1176},
  url = {https://pubs.usgs.gov/publication/cir1176},
  note = {Source identifier: cir1176}
}