@misc{indiciae05f9428d634d,
  title = {Dye penetrant for surfaces subsequently contacted by liquid oxygen Patent},
  author = {Giles, R. M. F. and Pollack, I.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19710017694},
  note = {Source identifier: 19710017694}
}