@misc{indiciaeeb088fb37479,
  title = {Some geophysical work in the U.S. Geological Survey},
  author = {D. L. Campbell and V.F. Labson and V.J. Grauch},
  year = {2000},
  url = {https://pubs.usgs.gov/publication/70104178},
  note = {Source identifier: 70104178}
}