@misc{indiciae18fb417dfa7b,
  title = {Jasperoid in the United States; its characteristics, origin, and economic significance},
  author = {T.G. Lovering},
  year = {1972},
  doi = {10.3133/pp710},
  url = {https://pubs.usgs.gov/publication/pp710},
  note = {Source identifier: pp710}
}