@misc{indiciae481f09c5be30,
  title = {The Ranger 9 flight path and its determination from tracking data},
  author = {Borncamp, F. and Liu, A. S. and Piaggi, E. G. and Trask, D. W. and Vegos, C. J. and Wallace, R. A.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19690001478},
  note = {Source identifier: 19690001478}
}