@misc{indiciae2ef7c98ed623,
  title = {A precision, active, table leveling system.},
  author = {Debra, D. B. and Mathiesen, J. C. and Van Patten, R. A.},
  year = {1966},
  url = {https://ntrs.nasa.gov/citations/19660059597},
  note = {Source identifier: 19660059597}
}