@misc{indiciaeb02334846a5e,
  title = {MICROMAG; a magnetometer data processor for portable magnetometer and Apple microcomputer},
  author = {P. G. Schruben and J.T. Hanley},
  year = {1985},
  doi = {10.3133/ofr8540},
  url = {https://pubs.usgs.gov/publication/ofr8540},
  note = {Source identifier: ofr8540}
}