@misc{indiciae01ee731dce1c,
  title = {Isopleth maps of iron, manganese, vanadium, and related elements in stream sediments of West Virginia},
  author = {M. E. Hinkle and K. C. Watts and W. R. Griffitts},
  year = {1994},
  doi = {10.3133/i2364d},
  url = {https://pubs.usgs.gov/publication/i2364D},
  note = {Source identifier: i2364D}
}