@misc{indiciae8841d192a996,
  title = {Location of abandoned wells by magnetic surveys: Location maps and aeromagnetic contour maps},
  author = {F.C. Frischknecht and D.P. O'Brien and R. Grette and P. V. Raab},
  year = {1985},
  doi = {10.3133/ofr85614b},
  url = {https://pubs.usgs.gov/publication/ofr85614B},
  note = {Source identifier: ofr85614B}
}