@misc{indiciaef47c55dff571,
  title = {Obtaining changes in calibration-coil to seismometer output constants using sine waves},
  author = {Adam T. Ringler and Charles R. Hutt and Lind S. Gee and Leo D. Sandoval and David C. Wilson},
  year = {2013},
  doi = {10.1785/0120130128},
  url = {https://pubs.usgs.gov/publication/70125466},
  note = {Source identifier: 70125466}
}