@misc{indiciae1622bafeaeb5,
  title = {Iron prospect near Kayalar, Balikesir Province, western Turkey},
  author = {Gerhard W. Leo},
  year = {1972},
  doi = {10.3133/ofr72231},
  url = {https://pubs.usgs.gov/publication/ofr72231},
  note = {Source identifier: ofr72231}
}