@misc{indiciae4a49fc6f7220,
  title = {Map showing potential metal-mine drainage hazards in Colorado, based on mineral-deposit geology},
  author = {Geoffrey S. Plumlee and Randall K. Streufert and Kathleen S. Smith and Steven M. Smith and Alan R. Wallace and Margo I. Toth and J. Thomas Nash and Rob A. Robinson and Walter H. Ficklin and Gregory K. Lee},
  year = {1995},
  doi = {10.3133/ofr9526},
  url = {https://pubs.usgs.gov/publication/ofr9526},
  note = {Source identifier: ofr9526}
}