@misc{indiciaeb024836744a2,
  title = {Two Tethered Balloon Systems},
  author = {Youngbluth, Otto and Owens, Thomas L. and Storey, Richard W.},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19900000056},
  note = {Source identifier: 19900000056}
}