@misc{indiciae92f5725782a0,
  title = {Materials provided at the workshop Geophysical map interpretation on the PC, convened April 21-22, 1993},
  author = {V.J. Grauch and J. D. Phillips and D.B. Hoover and J. A. Pitkin and K.E. Livo and A. E. McCafferty},
  year = {1993},
  doi = {10.3133/ofr93560b},
  url = {https://pubs.usgs.gov/publication/ofr93560B},
  note = {Source identifier: ofr93560B}
}