@misc{indiciaeebd01163d3e3,
  title = {Evaluation of a semi-active gravity gradient system. Volume I - Technical summary},
  author = {Nishinaga, R. G. and Wheeler, P. C. and Williams, H. L. and Zaremba, J. G.},
  year = {1966},
  url = {https://ntrs.nasa.gov/citations/19670002703},
  note = {Source identifier: 19670002703}
}