@misc{indiciae38119db60e6a,
  title = {Lathe attachment used to machine elliptical cones},
  author = {Allen, J. H., Sr. and Wobig, O. A.},
  year = {1965},
  url = {https://ntrs.nasa.gov/citations/19650000166},
  note = {Source identifier: 19650000166}
}