@misc{indiciaee02c5edb93e5,
  title = {Three-dimensional models aid visualization of engineering drawings},
  author = {Mcdougal, A. R. and Aardahl, C. E.},
  year = {1975},
  url = {https://ntrs.nasa.gov/citations/19750000179},
  note = {Source identifier: 19750000179}
}