@misc{indiciae93da3b5b80ef,
  title = {Magnetometer traverse on Plum Island near Newburyport, Massachusetts},
  author = {Robert W. Simpson and Wallace A. Bothner},
  year = {1979},
  doi = {10.3133/ofr79435},
  url = {https://pubs.usgs.gov/publication/ofr79435},
  note = {Source identifier: ofr79435}
}