@misc{indiciae1f3f2f94586e,
  title = {Space contamination due to manned vehicles.},
  author = {Bonner, G. P. and Kovar, N. S. and Kovar, R. P.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19690060352},
  note = {Source identifier: 19690060352}
}