@misc{indiciae9525d8c27c99,
  title = {Automatic rezeroing circuit for bore-hole strainmeter},
  author = {R.J. Mueller and D. Myren},
  year = {1986},
  doi = {10.3133/ofr86190},
  url = {https://pubs.usgs.gov/publication/ofr86190},
  note = {Source identifier: ofr86190}
}