@misc{indiciae1d7009f3daa1,
  title = {Automatic transponder},
  author = {Anderson, R. E. and Brisken, A. F. and Lewis, J. R.},
  year = {1977},
  url = {https://ntrs.nasa.gov/citations/19770024406},
  note = {Source identifier: 19770024406}
}