@misc{indiciae9caaee925490,
  title = {A practical, low-noise coil system for magnetotellurics},
  author = {William D. Stanley and Richard D. Tinkler},
  year = {1983},
  doi = {10.3133/ofr8385},
  url = {https://pubs.usgs.gov/publication/ofr8385},
  note = {Source identifier: ofr8385}
}