@misc{indiciaee9819a189b86,
  title = {Active seismic experiment},
  author = {Kovach, R. L. and Landers, T. and Watkins, J. S.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19710021485},
  note = {Source identifier: 19710021485}
}