@misc{indiciaede9c8dcf88bf,
  title = {Magnetic field variations in temperate zone sporadic-E layers.},
  author = {Axford, W. I. and Cunnold, D. M. and Gleeson, L. J.},
  year = {1966},
  url = {https://ntrs.nasa.gov/citations/19670041120},
  note = {Source identifier: 19670041120}
}