@misc{indiciae8fdb07dd96c3,
  title = {Geomagnetic polarity zones for icelandic lavas},
  author = {P. Dagley and R.L. Wilson and J. M. Ade-Hall and G.P.L. Walker and S.E. Haggerty and T. Sigurgeirsson and N.D. Watkins and P.J. Smith and J. Edwards and R.L. Grasty},
  year = {1967},
  doi = {10.1038/216025a0},
  url = {https://pubs.usgs.gov/publication/70011554},
  note = {Source identifier: 70011554}
}