@misc{indiciaebc7454be88ce,
  title = {Automated vehicle guidance using discrete reference markers},
  author = {Johnston, A. R. and Assefi, T. and Lai, J. Y.},
  year = {1979},
  url = {https://ntrs.nasa.gov/citations/19790041103},
  note = {Source identifier: 19790041103}
}