@misc{indiciaeb3e4603020a5,
  title = {Projected-Fringe, Phase-Stepping Profilometer},
  author = {Mercer, Carolyn and Beheim, Glenn},
  year = {1992},
  url = {https://ntrs.nasa.gov/citations/19920000506},
  note = {Source identifier: 19920000506}
}