@misc{indiciaeaaa83314dee4,
  title = {Transient electromagnetic mapping of clay units in the San Luis Valley, Colorado},
  author = {David V. Fitterman and V. J. S. Grauch},
  year = {2010},
  doi = {10.4133/1.3445428},
  url = {https://pubs.usgs.gov/publication/70189023},
  note = {Source identifier: 70189023}
}