@misc{indiciae0a2c1566ae25,
  title = {Guidelines for low-level geophysical surveying with fixed-wing aircraft},
  author = {T.J. Donovan},
  year = {1984},
  doi = {10.3133/ofr84836},
  url = {https://pubs.usgs.gov/publication/ofr84836},
  note = {Source identifier: ofr84836}
}