@misc{indiciaec665bc0b2193,
  title = {Program ISDS : an interactive seismic display system for displaying and measuring seismic wave forms},
  author = {Peter R. Stevenson},
  year = {1979},
  doi = {10.3133/ofr79205},
  url = {https://pubs.usgs.gov/publication/ofr79205},
  note = {Source identifier: ofr79205}
}