@misc{indiciae7758618b5623,
  title = {Element concentrations in rehabilitation species from thirteen coal-stripmines in five Western States and Alaska},
  author = {L. P. Gough and R. C. Severson},
  year = {1981},
  doi = {10.3133/ofr81182},
  url = {https://pubs.usgs.gov/publication/ofr81182},
  note = {Source identifier: ofr81182}
}