@misc{indiciaecfd02bfaaa5f,
  title = {Real-time strapdown-attitude package evaluations},
  author = {Gilmore, J. P. and Mckern, R. A. and Swanson, D. W.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19750063778},
  note = {Source identifier: 19750063778}
}