@misc{indiciaed247c56929f5,
  title = {Acoustic Position Servosystem},
  author = {Leung, E. W. and Lee, C. P. and Wang, T. G.},
  year = {1985},
  url = {https://ntrs.nasa.gov/citations/19840000407},
  note = {Source identifier: 19840000407}
}