@misc{indiciae3cb4ccb52068,
  title = {Advanced launch vehicle computer programs for vertical takeoff trajectories, horizontal takeoff trajectories, and horizontal takeoff trajectories with sonic boom calculation},
  author = {Butler, J. V. and Perkins, T. E.},
  year = {1966},
  url = {https://ntrs.nasa.gov/citations/19690067862},
  note = {Source identifier: 19690067862}
}