@misc{indiciae355381e421bf,
  title = {Fitting aerodynamics and propulsion into the puzzle},
  author = {Johnston, Patrick J. and Whitehead, Allen H., Jr. and Chapman, Gary T.},
  year = {1987},
  url = {https://ntrs.nasa.gov/citations/19880023141},
  note = {Source identifier: 19880023141}
}