@misc{indiciae1f9897b3edfe,
  title = {Errors in magnetic direction finding due to nonvertical lightning channels},
  author = {Uman, M. A. and Lin, Y. T. and Krider, E. P.},
  year = {1980},
  url = {https://ntrs.nasa.gov/citations/19800046469},
  note = {Source identifier: 19800046469}
}