@misc{indiciaefa7df33a17c7,
  title = {Note on Hydromagnetic Propagation and Geomagnetic Field Stability},
  author = {Coleman, P. J., Jr. and Sonett, C. P.},
  year = {1961},
  url = {https://ntrs.nasa.gov/citations/20150022962},
  note = {Source identifier: 20150022962}
}