@misc{indiciae103bfc70c1c4,
  title = {Operating manual for the U.S. Geological Survey Minimonitor, 1988 revised edition, analog-voltage model},
  author = {J.H. Ficken and Clinton T. Scott},
  year = {1989},
  doi = {10.3133/ofr89403},
  url = {https://pubs.usgs.gov/publication/ofr89403},
  note = {Source identifier: ofr89403}
}