@misc{indiciae6d58c3d45c10,
  title = {Improved phase-ellipse method for in-situ geophone calibration},
  author = {Huaibao P. Liu and L. Peselnick},
  year = {2006},
  doi = {10.1111/j.1365-2478.1986.tb00480.x},
  url = {https://pubs.usgs.gov/publication/70014666},
  note = {Source identifier: 70014666}
}