@misc{indiciae6f8feeed2098,
  title = {Summary proposals for investigations of techniques in mineral exploration suited to the special needs of tropical regions},
  author = {Ralph Leroy Erickson},
  year = {1977},
  doi = {10.3133/ofr77526},
  url = {https://pubs.usgs.gov/publication/ofr77526},
  note = {Source identifier: ofr77526}
}