@misc{indiciaeb757b713f5c1,
  title = {Two-dimensional velocity, optical risetime, and peak current estimates for natural positive lightning return strokes},
  author = {Mach, Douglas M. and Rust, W. D.},
  year = {1993},
  url = {https://ntrs.nasa.gov/citations/19930044337},
  note = {Source identifier: 19930044337}
}