@misc{indiciae689588fb8fb9,
  title = {More on the alleged 1970 geomagnetic jerk},
  author = {L.R. Alldredge},
  year = {1985},
  doi = {10.1016/0031-9201(85)90138-4},
  url = {https://pubs.usgs.gov/publication/70013082},
  note = {Source identifier: 70013082}
}