@misc{indiciae345d35fb97ed,
  title = {A filter circuit board for the Earthworm Seismic Data Acquisition System},
  author = {Edward Gray Jensen},
  year = {2000},
  doi = {10.3133/ofr00379},
  url = {https://pubs.usgs.gov/publication/ofr00379},
  note = {Source identifier: ofr00379}
}