@misc{indiciaebd9a86cc7fd2,
  title = {Instruments for Reading Direct-Marked Data-Matrix Symbols},
  author = {Schramm, Harry F. and Corder, Eric L.},
  year = {2006},
  url = {https://ntrs.nasa.gov/citations/20100014145},
  note = {Source identifier: 20100014145}
}