@misc{indiciae7ae392def273,
  title = {Colorado Yule Marble; building stone of the Lincoln Memorial},
  author = {Elaine S. McGee},
  year = {1999},
  doi = {10.3133/b2162},
  url = {https://pubs.usgs.gov/publication/b2162},
  note = {Source identifier: b2162}
}