@misc{indiciae214878008f1f,
  title = {Volcano monitoring at the U.S. Geological Survey's Hawaiian Volcano Observatory},
  author = {Christina C. Heliker and J. D. Griggs and T. Jane Takahashi and Thomas L. Wright},
  year = {1986},
  url = {https://pubs.usgs.gov/publication/70176746},
  note = {Source identifier: 70176746}
}