@misc{indiciaecb18755b4e1a,
  title = {Development and testing of a tensor magnetic gradiometer system with trial monitoring near the Kilauea Volcano, Hawaii},
  author = {R. E. Bracken and T.P. Grover and G. S. Puniwai},
  year = {1998},
  doi = {10.3133/ofr98773},
  url = {https://pubs.usgs.gov/publication/ofr98773},
  note = {Source identifier: ofr98773}
}