@misc{indiciae49ff0ffd9815,
  title = {Multipath/modulation study for the tracking and data relay satellite system Final report, 14 Apr. 1969 - 12 Jan. 1970},
  author = {Birch, J. N.},
  year = {1970},
  url = {https://ntrs.nasa.gov/citations/19700017314},
  note = {Source identifier: 19700017314}
}