@misc{indiciae22d56fbd8a20,
  title = {Gravity gradient preliminary investigations on exhibit ''A'' Final report},
  author = {Houston, M. H. and Lloyd, G. and Rankin, D. A. and Thompson, D.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19690026569},
  note = {Source identifier: 19690026569}
}