@misc{indiciae2780e78d0946,
  title = {Combination Solar Sail and Electrodynamic Tether Propulsion System},
  author = {Charles L. Johnson and Gregory L. Matloff},
  year = {2003},
  url = {https://ntrs.nasa.gov/citations/20030068300},
  note = {Source identifier: 20030068300}
}