@misc{indiciaeb2d6616a019f,
  title = {A Study of Roman mining and metallurgy and their environmental consequences at Plasenzuela, Extremadura, Spain},
  author = {Robert G. Schmidt and Cathy M. Ager and Juan Gil Montes},
  year = {1999},
  doi = {10.30861/9781841710082},
  url = {https://pubs.usgs.gov/publication/70221803},
  note = {Source identifier: 70221803}
}