@misc{indiciaef8ddb2243b02,
  title = {Viking satellite orbit determination},
  author = {Hildebrand, C. E. and Christensen, E. J. and Boggs, D. H. and Born, G. H. and Hokikian, H. and Jordan, J. F. and Howard, W. B.},
  year = {1977},
  url = {https://ntrs.nasa.gov/citations/19770039367},
  note = {Source identifier: 19770039367}
}