@misc{indiciae56b1f678b15e,
  title = {Rocking-motion sensor for the blind},
  author = {Mandell, A. and Morgan, J. E. and Polhemus, J. T.},
  year = {1977},
  url = {https://ntrs.nasa.gov/citations/19760000366},
  note = {Source identifier: 19760000366}
}