@misc{indiciae9cc4086b4d93,
  title = {Volcano-tectonic structures, gravity and helium in geothermal areas of Tuscany and Latium (Vulsini volcanic district), Italy},
  author = {Filippo M. Di and S. Lombardi and G. Nappi and G.M. Reimer and A. Renzulli and B. Toro},
  year = {1999},
  doi = {10.1016/s0375-6505(99)00014-0},
  url = {https://pubs.usgs.gov/publication/70021507},
  note = {Source identifier: 70021507}
}