@misc{indiciaef33cf03840aa,
  title = {The Geophysical expression of selected mineral deposit models},
  author = {W. D. Heran and P. L. Hill},
  year = {1992},
  doi = {10.3133/ofr92557},
  url = {https://pubs.usgs.gov/publication/ofr92557},
  note = {Source identifier: ofr92557}
}