@misc{indiciae34f1ffc2bee8,
  title = {Mantle helium and carbon isotopes in Separation Creek geothermal springs, Three Sisters area, central Oregon: Evidence for renewed volcanic activity or a long term steady state system?},
  author = {M. C. Van Soest and B. M. Kennedy and William C. Evans and Robert H. Mariner},
  year = {2002},
  url = {https://pubs.usgs.gov/publication/70023904},
  note = {Source identifier: 70023904}
}