@misc{indiciaee69e4d22ae47,
  title = {Holocene geomagnetic secular variation recorded by volcanic deposits at Mount St. Helens, Washington},
  author = {J.T. Hagstrum and R. Hoblitt and C. A. Gardner and T.E. Gray},
  year = {2001},
  doi = {10.1007/s00445-001-0178-x},
  url = {https://pubs.usgs.gov/publication/70024989},
  note = {Source identifier: 70024989}
}