@misc{indiciae47b571f676ad,
  title = {A prototype global volcano surveillance system monitoring seismic activity and tilt},
  author = {E.T. Endo and P.L. Ward and D.H. Harlow and R. V. Allen and J. P. Eaton},
  year = {1974},
  doi = {10.1007/bf02599410},
  url = {https://pubs.usgs.gov/publication/70209225},
  note = {Source identifier: 70209225}
}