@misc{indiciaebf3e72501e7f,
  title = {From the Rocket Equation to Maxwell's Equations: Electrodynamic Tether Propulsion Nears Space Test},
  author = {Johnson, Les and Estes, Robert},
  year = {1999},
  url = {https://ntrs.nasa.gov/citations/20000010424},
  note = {Source identifier: 20000010424}
}